Don't use IE64
Its only included to allow developers to plan and program for the future. Essentially its a technology preview, in which many plugins don't work properly
Adobe Flash and Shockware for instance are not properly compatible
Some other audio and video codecs won't work properly
Try the "normal" IE ans see what happens
If you still have problems, reset the browser
Start > Control Panel > Internet Options >Advanced > Reset
sitigeltfel's problem with Firefix will be completely unrelated