Problems with SLI on 750i FTW

I am running Vista 32bit for the time being. This is a new build and my only problem so far is when I try to enable SLI in the Nvidia control center my computer locks up and I get a BSOD when I try to reboot. I have to uninstall and reinstall the drivers to get going again. I have tried several versions of display drivers including the latest WHQL from Nvidia. I run driver cleaner in safe mode each time. Anyone have any ideas?? Device manager and Nvmonitor see both cards and the 2nd card appears to be working just sitting there taking up a slot ! lol Thanks, Kevin

P.S. I have also updated to the latest Nforce mobo drivers as well.

BTW no overclocking as of yet other than the slight factory 9600 GT SSC overclock.

I got it. I wasn't holding my mouth right!