Eject dvd doesn'start recording

This sometimes happens when a disk is not formatted prior to recording .. the DVD is telling you it cant record on it at the time you want because it would have to format first and then start recording so missing the times you have set .
Best thing to do is use re- recordable discs only and format prior to use then the dvd should start straight away .
If not then the set has a serious read problem and requires looking at by a qualified engineer ... Regards Vortash