Burning Problem

Hi there, does any one know how to solve this burning problem?
I am using NERO 7 Essential and a PIONEER DVR-110D recorder to burn the avi, wmv and mpg. files downloaded from OTR TV. After decoding the files and viewing them on my PC, the movies are ok, but as soon as I burn the files on DVD-RW or DVD+RW cds to view them on my large TV through a DVD player (ONKYO DV-SP501) the video is choppy and the audio out of sequence.
Thank you