CSS for Twitter in sidebar

I am presenting my latest tweets in the sidebar using Twitter’s javascript:

<div id=”twitter_div”>
<h2 style=”display: none;” >Twitter Updates</h2>
<ul id=”twitter_update_list”>
follow me on Twitter
</div>
<script type=”text/javascript” src=”https://twitter.com/javascripts/blogger.js”></script&gt;
<script type=”text/javascript” src=”https://twitter.com/statuses/user_timeline/prazim.json?callback=twitterCallback2&count=13″></script&gt;

It looks beautiful EXCEPT that the title of the tweet is not properly indenting on either the left or the right.

I tried this CSS :
/* CSS for Latest Tweets */
div#right twitter_update_list li a
{
margin-left: 12px;
margin-right: 12px;
}
But it didn’t fix it.
Thanks for your help!
Sue