hi, I have Toshiba 5205-S703 with DVD Burner (model #SD-R6012). I have been burning dvd's for a long time, with no or minor problems. I had been using dvd-r's (tdk and maxell) Recently I have been receiving a message that the dvd I have just burnt is blank. This occured the first time while i was trying to burn dvd video files (using nero and copytodvd). dvd burning process was normal, after it had been finished, I would try to see if it were succesful but I'd get the message that I'd just inserted blank media!. After wasting several dvd's trying to burn both video or data, I bought a dvd-rw, to see what's going to happen. This time, after burning data, dvd becomes inaccesible. I can still read dvd's, and burn cd's. the dvd's I burnt prior to this problem still work fine too. I'm getting really frustrated. Please help!!!