Philips DVDR3390 problem

I've been using this recorder for a while and have been pretty happy. That is until lately, won't play Delta Farce", "Superbad" or "310 to Yuma". I've tired disks from Blockbuster and Family Video all the same. Only simularity is they are all by Lionsgate. Contacted Philips and she was VERY nice but, no help.

Any ideas?

Thanks!