Have you tried an IE reset? It might work.
It's a long time since I used IE6, but on IE7 the reset button can be found at Tools>Internet Options>Advanced tab.
Before you try it, however, please pay particular attention to the list of things that you will lose when you reset IE - add-ons, temporary internet files, etc. I seem to remember that it also deletes your favourites, so it's best to save them somewhere safe.
Obviously you need to decide whether these losses are tolerable.