cant open fullscreen!?!?!?!help

[Cage2288]

I have windows 7 ultimate, and when i try to switch a video (hulu, youtube or any video online) to full screen it doesnt work. It seems to try to open full screen but doesnt show it. Everything stops and i cant click on anything like it would if i had full screen open, i even get the sound, but no video. I have to press esc then everything is normal. This only happens when i switch my theme to window7 basic or windows classic. Full screen works fine when im using windows 7 aero themes. Any help would be awesome!!

 

[seekermeister]

The only time that I had any problems with full screen functions was when my firewall blocked it until I gave permission for it to work...unfortunately that permissions window was either slow to open, or opened in the background and I didn't notice it until closing the apps.

Why it shoould make a difference which theme that you use, I don't understand, but if it works, why not use Aero?