Windows 7: Won't detect second monitor

I am running the beta on a Dell M1530 (laptop) and it just won't recognize the second monitor at all. I was running dual-monitors just fine on Vista. Any suggestions?

Does windows recognize the drivers for your mobile GPU?

What do you mean? My primary (laptop) monitor looks just fine.

Go to Press Windows Key and Pause Break to bring up the System Properties. Then go to Device Manager. Under Device Manager go to Display Adapters. What does it say you have for a display adapter?

Ah I just updated my drivers and it' s good now. I feel so stupid I should have done that first. Thanks!

That's exactly what I was getting at! You're welcome and good luck with Windows 7!

I've been having a similar problem but mine seems to run a bit deeper.

I am using the windows 7 release candidate and I have an ATI Radeon 4770 graphics card (I think this may be the problem).

I cannot get the computer to even acknowledge the existence of a second monitor; when I go to 'display properties' it just acknowledges the larger of the two, and treats both monitors as if they were the same one.

I tried disconnecting the larger of the two, and it didn't seem to notice anything had changed.
I've gone to device manager and tried to update my display adapters; it just has 'standard VGA graphics adapter' and seems to think everything is properly up to date.

Everything worked seamlessly with Vista Ultimate 64-bit and I can't even get my dual monitor set up going on this new OS.

Have u installed catalyst?

Update; I figured out the location of the drivers on the disk that came w/ the graphics card, fed it into the driver updating feature w/in device manager and I can do the dual display thing now.

I ran the catalyst install manager, and nothing happens once the install manager finishes installing; i.e. I never get a chance to install 'catalyst control center', the process just stops. I had CCC on here before, but it wasn't working properly (presumably because I didn't have the drivers), I could only access this feature called 'hydravision', and had none of the options I'm accustomed to seeing w/in CCC (e.g, display manager). I think I need to uninstall, wipe everything ATI off the system, and go back in from scratch.

Atm it seems old cards don't like the 9.4 driver and new cards don't like the 9.4 CCC. Glad you got it working, but keep an eye out for the official 9.5 driver as it's supposed to be a good one.