FB-Connect plug-in not working in IE

Hello,

I was trying to implement what I thought would be a great plug-in for my blog. It is the fb-connect plug-in by Sociable. You can find the plug-in here: http://www.sociable.es/facebook-connect/

The plug-in works fine in Firefox, but does not render properly in IE, there's no login button. Like the site suggests, I added the following snip of code to the header.php file:

xmlns:fb="http://www.facebook.com/2008/fbml">

However the issue is still not resolved.

Here's my site:

http://activitydirectorblog.com

I'd like to keep Atahualpa and donate if I can get this to work. Otherwise, I'm considering using another theme so I can use Facebook Connect.

Thank you for any help you can offer!