Sounds like media problems to me. You can get a selection of different media to try from click here My brother in law uses their bulk supply white but I'm not entirely sure of the DVD media ref. but he does have the same recorder as you. The media that he uses would not work on my Sony. If possible try Ritek's G04 dye DVDs I think they work on just about anything. Also Bigpockets has a compatibility chart on their site.