Problem With Forceware 169.09 Vista 64Bit Drivers (UK)

Hello,
I've tried to install the new 169.09 Vista 64Bit drivers, but it seems to have a problem with my system.
The drivers install fine and i can log on fine, but after a minute or two the monitor will go onto standby and i can't do anything to recover it. All I can do is hold in the power switch to turn it off.
Once i restart the pc, as soon as the pc begins to display the vista log on screen, it will just go back into standby, and i have to switch it off at the power switch again.
I uninstalled the 169.09, in safe mode, and i've reverted back to the 169.04 drivers as they don't seem to have this problem.

System Specs:
Gigabyte 965P DS3 Revision 3.3
Intel Core 2 Quad Q6600 2.4GHz
4GB RAM
XFX Nvidia GeForce 8800GTS 640MB
Monitor is LG Flatron M2343A

Any help would be greatly appreciated.