I wanted to say they might have dropped support for the card. But the 2400 is actually newer than the 9600. Damn these people and their confusing numbering/advertising schemes!
Recognizes original card.
Does not recognize new card, unless you install the omega drivers, in which case it works just dandy.
So it's not a hardware issue specifically, but for some reason the new cat drivers are not recognizing the card, yet the old ones are (since that's where the omega driver came from)...
Test: Find a copy of the driver version your omega's were created from, and see if THAT recognizes the driver.
I'm not sure what it would tell us, but it's at least something to test. You could, in theory, work your way along the driver series until you hit a step where it stops recognizing the card. Then figure out what changed.
Not a bad idea. Do you know anywhere to downlaod Legacy Ati drivers, I can't find a link to them on the official AMD page?