If you have more than one dvd-drive it could be that Tages works only with the lowest in alphabetical order.

for example:
dvd-drives H: I:
works only with H:

other things you can try:
slow down your drive to 2x or 4x speed (Nero has a tool for this)

If all this don't work your dvd-drive may be incompatible with Tages. I have heard of old Toshiba drives and some LiteOn drives that are incompatible with Tages.