To remove the flicker from the page, I placed my drop down list in an update panel, but now it does not postback.
Here is the code with the control that I am trying to run a postback with; the id is ddlDepartment:
Code:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="newRequest.aspx.vb" Inherits="newRequest" Theme="forms" StylesheetTheme="forms" %>


<!DOCTYPE html>


<html lang=en>
<head runat="server">
    <meta charset="utf-8" />
    <title>New Request</title>
    <!--[if lt IE 9]>
        <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js">


        </script>
    <![endif]-->
</head>
<body class="scroll">
    <form id="frmNewRequest" runat="server">
        <!-- Script Manager Begin -->
        <asp:ScriptManager ID="newRequestScriptManager"
                           runat="server"
                           EnablePartialRendering="true">
        </asp:ScriptManager>
        <!-- Script Manager End -->
        
        <div id="newRequestTitle">
            <p>New Request for Password/UserId</p>&nbsp;
            <p>Change in Computer Accessibility Status Login</p>


        </div>


        <!-- New Request Begin -->
        <div id="newRequest">
            
            <!-- Request Type Begin -->
            <asp:Label ID="lblRequestType"
                   runat="server"
                   Text="Request Type">
            </asp:Label>
            <br />
            <asp:DropDownList ID="ddlRequestType" runat="server">
                <asp:ListItem  Text="--Select One--" Value=""></asp:ListItem>
                <asp:ListItem Value="N">New Employee</asp:ListItem>
                <asp:ListItem Value="U">Update Employee</asp:ListItem>
                <asp:ListItem Value="T">Terminated Employee</asp:ListItem>
            </asp:DropDownList>
            <!-- Request Type End -->


            <br /><br />


            <!-- Date Requested Begin -->
            <asp:Label ID="lblRequestDate"
                       runat="server"
                       Text="Date">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtRequestDate"
                         runat="server"
                         Enabled="False">
            </asp:TextBox>
            <!-- Date Requested End -->
            <br /><br />


            <!-- Requested By Begin -->
            <asp:Label ID="lblRequestedBy"
                       runat="server"
                       Text="Requested By">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtRequestedBy"
                         runat="server"
                         Enabled="false">
            </asp:TextBox>
            <!-- Requested By End -->


            <br /><br />


            <!-- Employee Name Begin -->
            <asp:Label ID="lblEmployeeName"
                       runat="server"
                       Text="Employee Name">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtEmployeeName"
                         runat="server"
                         Text="">
            </asp:TextBox>
            <!-- Employee Name End -->


            <br /><br />


            <!-- User ID Begin -->
            <asp:Label ID="lblUserId"
                       runat="server"
                       Text="User ID">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtUserId"
                         runat="server"
                         Text="">
            </asp:TextBox>
            <!-- User ID End -->
            <br /> <br />


            <!-- Job Type Begin -->
            <asp:Label ID="lblJobType"
                       runat="server"
                       Text="Permanent/Temporary">
            </asp:Label>


            <br />


            <asp:DropDownList ID="ddlJobType"
                              runat="server">
                <asp:ListItem Selected="True" Text="Permanent" Value="P">
                
                </asp:ListItem>
                <asp:ListItem Text="Temporary" Value="T">
                
                </asp:ListItem>
            </asp:DropDownList>
            <!-- Job Type End -->
            <br /> <br />


            <!-- Job Title Begin -->
            <asp:Label ID="lblPosition"
                       runat="server"
                       Text="Position">
            </asp:Label>
            <br />
            <asp:DropDownList ID="ddlPosition"
                              runat="server" AppendDataBoundItems="true">
                <asp:ListItem Text="--Select One--"
                              Value="">
                </asp:ListItem>
            </asp:DropDownList>
            <br /><br />
            <!-- Job Title End -->


            <!-- Department Begin -->
            <asp:Label ID="lblDepartment"
                       runat="server"
                       text="Department">
            </asp:Label>
            <br />


            <asp:UpdatePanel ID="updateDepartment" runat="server" UpdateMode="Conditional">
                <ContentTemplate>
                    <asp:DropDownList ID="ddlDepartment"
                              runat="server"
                              AppendDataBoundItems="true"
                              AutoPostBack="True">
                            <asp:ListItem Text="--Select One--"
                                          Value="">
                            </asp:ListItem>
                        </asp:DropDownList>
                </ContentTemplate>
            </asp:UpdatePanel>
            
            <!-- Department End -->
            <br /><br />


            <!-- Division Begin -->
            <asp:Label ID="lblDivision"
                       runat="server"
                       Text="Division">
            </asp:Label>
            <br />
            
            <asp:DropDownList ID="ddlDivision"
                              runat="server" 
                              AppendDataBoundItems="true"
                              Enabled="False"
                              AutoPostBack="True">
                <asp:ListItem Text="--Select One--"
                              Value="">
                </asp:ListItem>                  
            </asp:DropDownList>
            <!-- Division End -->
            <br /><br />
            
            <!-- Section Begin -->
            <asp:Label ID="lblSection"
                       runat="server"
                       Text="Section">
            </asp:Label>
            <br />
            <asp:DropDownList ID="ddlSection"
                              runat="server"
                              AppendDataBoundItems="true"
                              Enabled="false"
                              AutoPostBack="True">
                <asp:ListItem Text="--Select One--"
                              Value="">
                </asp:ListItem>                  
            </asp:DropDownList>
            <!-- Section End -->
            <br /><br />
            
            <!-- PC Name Begin -->
            <asp:Label ID="lblPcName"
                       runat="server"
                       Text="Assigned PC Name(s)">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtPcName"
                         runat="server">
            </asp:TextBox>&nbsp;
            <!-- PC Name End -->
             
            <asp:Label ID="lblExampleName"
                       runat="server"
                       Text="(Example: CVCMS117)">
            </asp:Label>


            <br /> <br />


            <!-- Effective Date Begin -->
            <asp:Label ID="lblEffectiveDate"
                       runat="server"
                       Text="Effective Date">
            </asp:Label>


            <br />
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <asp:Calendar ID="calEffectiveDate"
                          runat="server"
                          Caption="Select a date.">
                    </asp:Calendar>
                </ContentTemplate>
            </asp:UpdatePanel>
            <!-- Effective Date End -->


            <br /> <br />


            <!-- Status Begin -->
            <asp:Label ID="lblStatus"
                       runat="server"
                       Text="Status">
            </asp:Label>
            <br />


            <asp:DropDownList ID="ddlStatus"
                              runat="server">
                <asp:ListItem Selected="True" Value="N">New</asp:ListItem>
            </asp:DropDownList>
            <!-- Status End -->
            <br /><br />


            <!-- Similar To Begin -->
            <asp:Label ID="lblSimilarTo"
                       runat="server"
                       Text="Similar To">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtSimilarTo"
                         runat="server">
            </asp:TextBox>
            <!-- Similar To End -->
            <br /> <br />


            <!-- Update Reason Begin -->
            <asp:Label ID="lblUpdateReason"
                       runat="server"
                       Text="Update Reason">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtUpdateReason"
                         runat="server"
                         TextMode="MultiLine">
            </asp:TextBox>
            <!-- Update Reason End -->
            <br /><br />
                         
            <!-- Phone Number Begin -->
            <asp:Label ID="lblPhoneNumber"
                       runat="server"
                       Text="Phone Number">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtPhoneNumber"
                         runat="server">
            </asp:TextBox>
            <!-- Phone Number End -->
            <br /><br />


            <!-- Contact Number Begin -->
            <asp:Label ID="lblContactNumber"
                       runat="server"
                       Text="ContactNumber">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtContactNumber"
                         runat="server">
            </asp:TextBox>
            <!-- Contact Number End -->
            <br /><br />


            <!-- Contact Person Begin -->
            <asp:Label ID="lblContactPerson"
                       runat="server"
                       Text="Contact Person">
            </asp:Label>
            <br />
            <asp:TextBox ID="txtContactPerson"
                         runat="server">
            </asp:TextBox>
            <!-- Contact Person End -->
            <br /><br />
            
            <asp:Button ID="btnSubmit"
                        runat="server"
                        Text="Submit" />


            
        </div>
        <!-- New Request End -->
        
        
        
    </form>
</body>
</html>
Chris S.