DaVinci Pro 6 Disc Loading Tray Issue...

Hi, Around December 05 we purchased a DaVinci Pro 6 Disc printer which up until now has been working perfectly. The printer itself is fine it's the 6 disc loader tray which is causing us problems. There now appears to be movement in the discs as the tray passes through the printer and so our disc's are being smudged as they print. Nothing has changed with regards to the printers consumables or the media we are printing on, and we have tested printing through an A3 sheet of paper which prints off fine. I should say I've marked as urgent because CD duplication is a major part of our business for our courses and so stock levels have to be maintained. Thanks, Stuart Paterson Network Administrator