Audio sync problem

I. attempting to burn a dvd using Vision in Nero 8 and although the stability and quality of the video is exellent the audio is running 2 to 3 seconds behind the video.
The file I’m making the dvd from is a DVR-MS recording created by Microsoft Media center using a Hauppauge Nova-t dual tv capture card. Whilst in DVR-MS format everything appears to be ok but once nero is used the audio is out.
I.ve tried creating the dvd using Roxio 9 and there is no problem, but would like to use nero if possable as I prefere it.
If I convert the DVR-MS to Mpeg2 using Digital Media Converter the sound is then ok but it takes about 6 hours to convert a 1 hour program
Has anybody any ideas
Thanks for reading this