Yesterday, when I was burning a video I got an I/O error message (at least I think it was). I didn't want to deal with it at the time so I closed the application. Now it appears that ImgBurn doesn't recognize that I have a new blank DVD ready to burn (I discarded the one from yesterday). It says in the lower left hand corner "Device not ready (Medium not present)." And the device tab looks different.
Any ideas how to fix this?