Melvin Bragg 0 Newbie Poster

Hi
I have a HL-DT-ST DVD-RW GWA-4160B DVD/CD Rewriter.
It will read both DVD and CD but has stopped writing. I get error message in windows saying, Pease insert a writeable CD into drive E:\. In Nero I get a message saying the Drive in use by another programme.
Any help would be great.