For some reason, my first li in my nav is not responding to the negative margin I set for it. All the others are. I haven't been able to figure it out.

http://www.laserdocs.com/new/index.asp

PHP Code:
#nav {
width170px;
height240px;
background-color#9BD1EE;
margin-leftauto;
margin-rightauto;
}
#nav ul {
list-style-typenone;
padding-top8px;
}
#nav li {
width170px;
height39px;
list-
style-imagenone;
margin-left: -35px;
margin-bottom: -10px;
background-image:url(images/nav_button.gif);
background-repeat:no-repeat;
padding-left10px;
}
#nav li a, #nav li a:visited {
color#000033;
font-size9pt;
text-decorationnone;
font-weightbold;
}
#nav li a:hover {
color#990000;
text-decorationunderline;
}
#navbottom {
height15px;
margin-left: -3px;
margin-top: -10px;

PHP Code:
 <ul>
            <
li><a href="massachusetts_tattoo_removal.asp">Tattoo Removal</a></li>
            <
li><a href="http://www.thesnoringcenter.org">Snoring Treatment</a></li>
            <
li><a href="massachusetts_vein_treatment.html">Leg Vein Treatment</a></li>
            <
li><a href="massachusetts_vein_treatment.html">Facial Vein Treatment</a></li>
            <
li><a href="massachusetts_wrinkle_treatment.html">Wrinkle Treatment</a></li>
            <
li><a href="massachusetts_cosmetic_surgery.html">Cosmetic Surgery</a></li>
           <
li><a href="massachusetts_cosmetic_surgeons.html">Meet the Doctors</a></li>
           <
li><a href="contact.asp">Contact Us</a></li>
 
        </
ul

Can anyone see where I've gone wrong?