Hey guys,
I need some help. Cheapasiangamerguy and Penewab2007 i'm looking in your direction

This is my first SLI setup. I built the PC with one graphics card installed, started up the machine and installed the 64 bit drivers from nvidia's website. I then turned off the computer, installed the second card with SLI bridge, and restarted the computer. When Vista booted, the Nvidia drivers game me a prompt saying something along the lines of "We have detected a second graphics card has been installed, would you like to enable SLI". I clicked yes and everything ran fine. A few weeks later, my drivers crashed in game. After that, it appeared that my SLI was disabled and my computer was running on a single card.
I removed one card, booted, shut down, installed the card again and booted, I wasn't given a prompt. I tried reinstalling the drivers, and still no prompt. I can't find any type of Nvida tool to tune my graphics drivers, and I can't find any way to determine if SLI is indeed enabled and functioning correctly. There is a 95% chance that this is a completely stupid question and the answer is right in front of my face but unfortunately I haven't found it yet. Any help is appreciated.
GIGABYTE GA-M750SLI-DS4 Motherboard
AMD Phenom 9850 BLACK EDITION
Western Digital Caviar SE16 WD5000AAKS 500GB
G.SKILL 8GB DDR2 1000
Dual GeForce 8800 GT 512MB running SLI