Computer freezing on vmware workstation

I am using vmware workstation to run windows 7 64 bit and when i go to a video on youtube the video and everything works perfectly fine but as soon as i try to put the video full screen the whole system freezes and i am forced to turn off the virtual machine and turn it back on.

If you knwo what is wrong and how to fix it i will be grateful

Have you tried updating your video drivers for Windows 7 RC?