Expression Encoder 4 Screen Capture malfunction @ Windows 7 x64

Ref:
http://social.expression.microsoft.com/Forums/en/encoder/thread/5786d579-7f1b-42ae-8586-e0a80b7aec55

The function of screen capture was fine in windows 7 x86 system.
It can't be work in x64 version and may be solved by change the resolution test.