Problems with Internet Explorer

Hello,
My website looks fine in Safari, but when I open it in Internet Explorer, there are many problems.
Text has too little leading, and links show up as white (instead of blue).
I wrote in manual code to fix most of the leading, but this is a very counter productive way to fix it, and doesn’t fix things like the Twitter feed and things controlled with php.

Does anybody have any advice for me? I have tried code like…

[code]
<!--[if IE]>
<link rel="stylesheet" href="<?php bloginfo('stylesheet_directory'); ?>/IE.css" type="text/css" media="screen" />
<![endif]->
[/code]

in my header.php file, and then made the corresponding ie.css file. Nothing seemed to be responding though.

I would greatly appreciate any help. Let me know if you need more information. Thanks!