MotorStorm Arctic Edge

[hdd60311]

I tried v0.9.9.1-588, all default settings, both USA version and European version game have same problem that quit match back to game menu and go into match again it hangs at loading page.
I use win7 x64 and ATI hd5670

Edit: Alright I got the point that seems strange, I tried to change cpu clock like this image
and the hanging issue is gone, but if use default cpu clock setting the hanging issue is still there...