Hello,
I have a scsi Pioneer DVD and I can't see it

This is a new problem. In the device manager, I see the scsi card but not the DVD player
Where is it ?
I just remove it and the scsi card, reinstall them and I don't see my dvd ??
Please help me......Last week, I have remove an HD from my PC and I think this is from this moment. The DVD just disapear
If I put a cd in my DVD drive, the light flash and I hear the CD turning.
Also I have DIskAlert to monitor my drives and it see two drives

ATA\Disc 0 and unknown\Disc 1