Hi,
I had the same problem. In attempting to fix the problem I returned the DVD-rom to the manufacturer, but that did not fix the problem. The unit they sent to replace the damaged one did not work either. The manufacturer said I was using the wrong DVD's. Well I was not using the recomended CD-RW and they worked fine. The next thing a friend came up with was the processor not being fast enough.
I don't know what your problem is but I do hope that somebody does. Perhaps they will come up with a solution to my problem.