Css/html problem with forum newsletter

[ICKatrina]

Ok making my forum newsletter and been trying to learn html and css and I have a problem. I put in a CSS horizontal menu and I am stuggling with every other link in my newsletter having the same background.
So I guess I am asking is there a way to do a similar thing in html or a way to keep this from effecting the whole newsletter instead of just the menu bar?

<STYLE type=text/css>UL {
PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FLOAT: left; PADDING-BOTTOM: 0px; MARGIN: 0px; WIDTH: 100%; PADDING-TOP: 0px; LIST-STYLE-TYPE: none
}
A {
BORDER-RIGHT: white 1px solid; PADDING-RIGHT: 0.6em; PADDING-LEFT: 0.6em; FLOAT: left; PADDING-BOTTOM: 0.2em; WIDTH: 6em; COLOR: white; PADDING-TOP: 0.2em; BACKGROUND-COLOR: #330099; TEXT-DECORATION: none
}
A:hover {
BACKGROUND-COLOR: #330099
}
LI {
DISPLAY: inline
}
</STYLE>
<UL>
<LI><A href="http://www.freewebs.com/teeger671/index.htm">Home</A>
<LI><A href="http://icandme.9.forumer.com/index.php?">Forum</A>
<LI><A href="http://icandme.9.forumer.com/index.php?c=17">Work at Home
help</A>
<LI><A>
href="http://pub30.bravenet.com/chat/show.php?usernum=2541657076&amp;cpv=2">Chat
room</A> </LI></UL>

I basically just put my own links, color, and info from their example http://www.w3schools.com/css/css_examples.asp

Thank you for any help you can provide.