I cannot down load any dvd info to my drive, Why? (Toshiba TS-L802A)

[qanda]This question is published in the hardware section for the Toshiba TS-L802A. Click here to view full specs.[/qanda]It does not recognize the dvd side. I can write CD’s and read them but not DVD’s Why?

Can it read the HD DVD side?
Maybe bad disc (DVD side)? There’s plenty of problem with HD DVD/DVD combo disc. Which movie is this?