SLI in Alienware

Hope someone can help with this

Alienware m9700 laptop
AMD Turion ML-44 2.4ghz Processor
Dual Nvidia 7900GS

When I try to enable SLI the screen goes black and flashes

I have to shut machine down and start in Last Known Good setting

Thanks In Advance

Newton

I bought this laptop a few months ago and managed to erase all the drivers. Had trouble with partitions {2 HD's} but got it goin again.

Downloaded drivers from Alien/Dell, back to square 1, I think that is when I first tryed to enable SLI with blackscreen issue.

Backup approx 1 month

So I was playing Brothers In Arms and shut down to run
an errand. When I tried to restart the laptop would not power up. Pretty sure I
turned it off, HD light would blink, Dvd Drive clicks but no loading, fans turn
on, unable to access Bios and it wouldn't power off, had to remove battery. Took
to shop for diagnosis BAD Motherboard and or CPU. Brought it home yesterday and
was messin with it. Pressing Delete and Start and F2 not sure what combo or order
but the Alienware Screen came up, pressed Delete and American Megatrends Screen that
says CMOS Checksum Bad [As before meltdown- Need to replace CMOS battery] Got
into the Bios Ended up starting to load XP Screen with scrolling timer scrolling
and then quit, sat for a few minutes then removed the battery. Unable to do it
again, tho it seems the Alie Screen shows for a fraction of a second just as the
battery discharges/dies. (This was about a month ago)

So about 2 weeks ago I thought I'd mess with it and look inside and see if somethin loose might fall out

Pressed start button and and delete like a chicken peckin and got a screen, then Bios etc, and its been working since except for

the SLI Enabling glitch And how do you update the BIOS?

Thanks

Newton

I have the following:

m9700_Bios_v3.17

Newton

Yeah I had already downloaded 318, just leery of trying it, reference I saw it used for

was with Vista, I still have XP. Dont wnt to screw things up even worse

Thanks

Newton