Removable drive

After I attach a removable REV cd drive to USB port, I cannot eject, format
the cd in the drive. It is like the OS is locking the REV drive and will
only let me write to it. In order to format the drive, I have to unplug the
drive from power, and USB then plug into XP system format the drive and then
reverse back to the Vista system. If I write to the drive and fill up the CD,
then I am told to add a new CD/drive but I cannot eject the drive and have to
plug etc. I have no such problems on XP
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PHOC