OK...This should be very basic...im just not seeing the problem: I've created and external stylesheet and am linking to it in my HTML.
I've saved this as a text file: example: test.css
But it's still not linking.

Here's My StyleSheet: (this is all, do I need to declare this a style?)

.heading_1{font-family:verdanna,arial,helvetica,sans-serif;
font-size:16pt;
color:#ffffff;
font-weight:bold}

.heading_2{font-family:verdanna,arial,helvetica,sans-serif;
font-size:14pt;
color:#993300;}

.body_text{font-family:verdanna,arial,helvetica,sans-serif;
font-size:12pt;
color:#000000;}

And in my HTML I <span class=".body_text">test</span>

Any ideas why this wouldn't be working?