I just bought a new HD and reloaded XP. It loaded fine but now when I boot up, I can hear the cdrom trying to read a disc even though I don't have one in it. Then the tray comes out. If I just shut it then it tries to read some more and then opens the tray again. XP will boot (slowly) and the the tray keeps coming out. It will not stay closed. I have no idea what the probelm is. I made sure that DMA mode was selected under XP. I have an ASUS A7V133. I have the HD on the Promise Ultra ATA-100 Primary and the CD-Rom on Primary IDE. I also have a DVD on the Ultra ATA-100 Secondary and a CDRW on the Secondary IDE. If anyone can help, I would greatly appreciate it Thanks!