If I was you I would delete the drive from the System in Control Panel and then restart the computer and let Windows find the drive again. You may need the drivers from the wensite if windows dosn't reconise the drive.
To get to your drive.
Right click on My Computer then properties. Go to the Hardware tab then Device Manager. Go to CD/DVD open the plus button and then delete the drive.
If you don't have My Computer on your desktop then find the Control Panel and click on Performance And Maintence then System. Then follow directions above.
Hope this helps.