i tried playing THE MUMMY'S TOMB, that used to play correctly, and it now freezes 20 minutes into the program. Has anyone try to contact Universal to get replacements for discs that once played correctly. These sets have a terrible reputation. Just wondering if they back their product more than 30 days, The set was purchased a number of years ago from AMAZON...and i am sure they would not exchange. If you were successful...do you have a contact point? Thanks for your help.