Hi krobby, welcome to our forum!
I think the writer has problems with the CDRW discs you are trying to use. This can be due to different causes. First, I'd advice you to try another CDRW disc (the newer the better). If that doesn't work, it could be that your writer is having a problem. This can perhaps be fixed by updating your writer's firmware.
Try this, and if it doesn't work, report back!