Try a new drive.
My system: Dell XPS710 with TSST DVD+-RW TS-H653A SCSI Cdrom
Windows Vista Home Premium SP1
It is wierd that the DVDRom only loads disk in the first few
minutes after the Vista startup, a while later, it just don't
work anymore, and if I put disk into it, it tells me that there's
no disk in the DVDRom and then eject.
Does anyone recognize the problem?