Native resolution doesn't appear

I just changed my PC from one with Radeon 4800 and WinXP to one you can see in my profile (most important: Gigabyte GeForce GTX560 and Win7Pro64).

I didn't, however, change my NEC LCD19WV monitor with native resolution 1440x900 (VGA cable connected via adapter to DVI-I).

Thing is, that i simply can't force my system to "recognize" that monitor use 1440x900 resolution (it sees some low 4:3 resolution as native). It's not on a list. Also any other 16:10 resolution i try is sort of blurry.
On top of that when i try to force 1440x900 32bit an and 60hz all i get is flattened screen with two inch-thick black bars on top and bottom of it.

Have all drivers up to date etc. and no idea what to do with it and could really use your help guys.

Michael

Yes, but i had to practicly shove it down the computers throat but manualy browsing for driver file. Before that any semi-automatic attempts to insta those drivers (be it from cd or using downloaded NEC softwere) ended with "Generic PnP".

However when i finally managed to get that name there that was p. much only thing that changed. Resolution options etc. remained the same.

Adampter i'm using has male DVI-A layout, while card it's connected to has female DVI-I (dual link) one.

Onl D-Sub port i have is one on motherboard and when i tried to plug monitor there i couldn't even get screen running.

EDIT: While i was browsing web looking for solution saw a suggestion that i should get VGA <--> DVI cable and connect my monitor directly to the card with it. That is supposed to help card to recognize monitor.

Oh, and about that driver - it's just a name, i looked deeper into it's details and it's all "Generic PnP" stuff.

SUCCESS... sort of :P

Ok, I worked on that BIOS a bit harder and once i chenged Internal Graphic Adapter from (if i remember correctly) PEG/PCI to PCI/iGPU I was able to get signal when pluged into onboard VGA (tho when i was pluged to the card there were no signal).

Computer made some registry changes, restarted itself and once it was back online i was able to select perfectly good warking 1440x900 resolution!

However...

My GTX560 is now sort of offline and only cart i am able to use is onboard Intel one... Less than ideal.
Any tips how to combine both things?

EDIT: Oh, and there weren't any AUTO option in that bios settings, only ones there:
iGPU
PCI/iGPU (one i chose)
PCI/PEG
PEG/iGPU
PEG/PCI (one that was on before i think)

Earlier i also changed iGUP Multi-Monitor from disabled to enabled in case its relevant.

In case somene has similar problem.
All that had to be done was moding nvidia driver by adding 1440x900 mode to one line of code and it's all working :)
Thanks for help here anyways, without it i wouldnt know where problem was.