[RockWizard]

Check your owner's manual for the burner ---- most will give recommedations on what type of media works best with the unit. Sometimes, they'll update what will work on the website. Media....I'm using a Lite-On burner(built like a tank!) and the only media I've had trouble with is Memorex....both single and dual layer. DL - TDK +R DL's have been working fine, despite burning at ONLY 2.4x.

Is everything else working fine burning wise? If so, then the media is the problem, not your burner. Machines are peculiar sometimes!