DVD-RW in new case no longer plays lil help?

Hello,
I have a DVD-RW drive that came out of a complete gateway that was bought off the line with everything already installed and running, like one of those package deals you get from Wal-Mart. We were having problems with electrical in our house burning out the computer, but thought it was actually the computer burning itself out. We scrapped the gateway, and took the usable parts and put them in a new case with new motherboard. Now my DVD-RW won't read any kind of DVD, only cd's or games, and I can't burn any of my home movies from my camera to a disc. I've tried downloading drivers, but I read somewhere that it doesn't have drivers to begin with. I don't have the Gateway CD that came with all the original software for these parts. Anyone have any ideas on what I need to do to get this one up and running, or should I just scrap it and buy a whole new DVD-RW drive? Thanks much.

Lisa
da nina's mommy