Assuming you are using a version of Movie Studio (which one and which edition, by the way?) to burn a video to DVD it would be very useful if you were able to show a screenshot of any error message you see (or at least its full wording) and, if you see a message to access the Burn Log, post the latest set of entries in that log here.
Speaking personally I only ever use reputable quality DVD-R single-layer discs for burning DVD Videos and have never experienced a problem caused by the actual burning process. I do use DVD+R but only for dual-layer discs. What brand of discs are you using?