Nvidia Control Panel - Custom Resolutions - 1:1 Pixel Mapping

I just built a new HTPC using a Geforce 9300 motherboard and 32-bit Vista. I have loaded the latest Nvidia drivers from Nvidia's web site. With my previous HTPC using XP Pro and a Geforce 6200 video card I could go in to the Nvidia control panel and adjust the custom resolution to 1360 x 768. My projector's native panel resolution is 1366 x 768. With this resolution the display would snap right in and I would get 1:1 pixel mapping. With my new setup I can enter the same infomation and click OK to test the resolution. Sure enough the resolution snaps right in and I have 1:1 pixel mapping while the resultig window counts down 15 seconds. It asks whether I want to keep the resolution or in 15 seconds it will revert back to the previous setting. I click OK to keep it but then the custom resolution disappears and the 1:1 pixel mapping is gone! It more less reverts back to 1024 x 768. The 1360 x 768 resolution is then clearly displayed in my list of custom resolutions but I can't really enable outside of the 15 second test window. Has anyone seen this behavior before? Can anyone offer a potential workaround or solution outside of purchasing powerstrip?

Thanks. I did check that and it still reflected a maximum of 1024 x 768 and I couldn't slide to the right any more. I started approaching it from a different angle and figured out the issue. The driver it chose to use for my display was the standard monitor.inf. It clearly recognized that it was connected to a projector since it displayed Sanyo PLV-70 but once I looked at all the modes found for that monitor driver it had everything locked down anything above 1024 x 768. Once I checked off that the monitor should use ALL resolutions it already one listed for 1360 x 768. I tried it via display properties and voila' it locked right in! Thanks again.