I would attempt to delete and recreate the active desktop. If that does not work, perhaps the content on the website itself is having technical problems.
You can also attempt to reset Internet Explorer back to defaults to see if that resolves the issue.
1. Click START
2. Click 'Control Panel'
3. Double click 'Internet Options'
4. Click on the 'Advanced' tab and select 'Reset...' at the very bottom of the Window
