I have a Toshiba DVD-ROM SD-M1502 and when I try to burn a DVD it ejects the blank DVD I put in and says there is no DVD present although there is one. I have tried meny different blank DVDs within two different brands. I used two different programs also, DVD Shrink and Nero 6 Ultra Edition. They both say the same thing when it is time to burn. Also when I insert a blank DVD the message to select what you want to do with it pops up and says it is a blank CD. It said that with a few different disks of two different brands that I have used. I hope one of you will know what to do and be able to help me. Thanks in advance.