Widescreen_CRT dual views

I've just bought an NEC 24 WMGX widescreen monitor at great cost. It has digital and analogue inputs. I run FS9 in XP Pro with a 7800GTX which has two digital (DVI-I) outputs. I run the two monitors in dual view - the NEC as primary, the CRT for FSNav, ATC, GPS etc.When I use an analogue input into the monitor I can set the NEC primary display to 1600 x 1200 and the CRT to 1280 x 1024. This gives a good wide cockpit 2D view on the main monitor with easily readable gauges etc on the secondary. In contrast, when I use a digital input into the NEC widescreen the highest resolution I can get is 1024 x 768. This produces a horrible, grainy, elongated image. I have tried every setting I can see in the NVidia control panel but this was the highest resolution I could coax out of it! I even customised a HD 1920 x 1200 setting but this produced a huge image way beyond the desktop boundary. BTW, I'm running a newly installed set of drivers - 181.22Am I missing something obvious here, or is FS9 just not set up to output digital signals to widescreen monitors? ThanksJohn