Can anyone shed any light on this strange problem with my dvd recorder. I've had it for 2 years and it been great, just in the last few weeks it will not play pre recorded films bought from shops, however it will play record, copied cd's DVDs and plays perfectly with ones i have copied and recorded to (all types) but when i put a normal rented or purchased film it has trouble reading the disks and then spits them out with a unrecognized disc error. All the discs are new and have no marks. I have tried a lens cleaner disk but didn't help.