Win 7 game freezes and monitor shuts off

[Ripptorr]

I've followed the install instructions to a tee, played in both windowed and full screen. Switched the compatibility to XP service pack 2 (as instructed).

The game runs FLAWLESSLY. No problem logging on, smooth frame rate. Zone and camp without issue.

-HOWEVER-

Anywhere from 5-25 minutes in the screen just turns black. No cursor. If there was a sound playing when it froze it repeats. My monitor shuts off as if in power saving mode. I tried removing native win 7 power saving features. Installed "insomnia" which prevents the monitor from shutting down. Doesn't help. Still crashes and monitor shuts off. Can't ctrl+alt+delete, tried some other shortcuts too. No success. Have to hard reboot.

Anybody else having this issue?