Nero wont read from dvd-rom no more

hi, i have recently upgraded to Nero and have started to notice that nero wont read from my dvd-rom drive any more.

if i put a disc that has already been recorded by my in the drive to do a ‘dvd copy’ it just keeps ejecting the tray saying that the disc is either blank or invalid, but if i try and do a dvd copy from the pioneer 106 drive it will work, but i dont wanna use that drive all the time, thats why i have a dvd rom, and this the first time i have encounted this problem.

the dvd-rom seems to be working ok cause if i put a disc in the drive ansd just open it as normal in explorer is shows all the files as normal.

any help would be welcome