Lost the monitor after connecting via DVI

I've had an X2Gen 22" monitor connected to our G5 via DVI/VGA adapter to the VGA input on the monitor for a couple of years. Another monitor I just bought came with a DVI cord and a VGA cord. I decided to try the X2Gen/G5 connection via DVI since I now have a cable. The computer can't/won't recognize the monitor now that they're DVI connected. And screen images are ugly! I can't even calibrate it because the computer tells me it cannot identify the monitor. Any ideas anyone? (Other than going back to the VGA cable?)
Thanks,
Jon

Just a thought, but try zapping the PRAM. Good luck.

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