CD-RW / DVD-ROM Drive won't recognize DVDs

I recently installed a new harddrive and DVD-RW drive. I installed all of the software and drivers. I have a Hl Dl St cd-rw GCE 4800 CD-RW / DVD-ROM drive additionally. This used to play DVDs but now it won’t even recognize them. It just keeps spinning. It still will play, burn, and read CDs. I have assigned this drive as slave while the DVD-RW is master. I have had trouble even finding out what king of cd burner that is much less finding a solution to the DVD problem. Please help…

First thing you should try to do is connecting it alone as a master to see if it still working OK. The problem may be that it doesn’t like to work as a slave with the new drive. Also check that you have set the jumpers properly.