I had very similar problems (same symptoms) in the past trying to connect an LS-120 drive into an IBM Aptiva which should have worked fine. To cut a long story short it was due to a conflict that proved unresolveable with the make of drive I had bought, but fitting an alternative make worked with no problems whatsoever. I would suggest borrowing an alternative CD-RW drive from a friend if you can to see if you get the same problems. If not, you need a different make! Ain't PCs wonderful?! LC.