After I installed and satartes the program, it says my graphic card drivers are old. But they are the newest. So I think the problem is the graphic card itself, a ATI Radeon HD6490M.
Is it possible that this graphic card isn't compatible with Premiere Pro 64 bit Trial?
For future reference, please provide more information when you ask a question... Information FAQ http://forums.adobe.com/message/4200840
Does that mean you have a laptop?
If yes, read about dual video laptop problems
-link to why http://forums.adobe.com/message/4685328
-HP Fingerprint/Password conflict http://forums.adobe.com/thread/911575
-Mac Utility http://forums.adobe.com/thread/1017891?tstart=0
If you don't have a laptop with dual video, you need to go directly to the ATI site and check the driver version for you model