Problems with dynadock PA3778U-1PRP dynadock V
 

Hi friend, I have a dynadock PA3778U-1PRP dynadock V, this dock has DVI and VGA output, when I connect my LCD from DVI to HDMI, I can see, but resolution is too poor.
I downloaded latest driver, V7.1 but the problem is that when I executed, notify me that can't run in this SO WIndows 7 64 bits, the other problem that I have, is that when I connect cable between dock and LCD, system becomes too slow.

Please can you help me to fix this problem

Regards

Cesar