Hope somebody can shed some light on this error message I keep getting.

I brought Amityville 2 on DVD a few weeks back & im trying to get it onto VCD just for the fun of it, however after setting everything up in DVDx I keep getting an error message, it seems to be at the same point everytime, the mpeg1 file that is being made gets to 112mb when the error happens.

The error message is this:

Video Unit Buffer Full
Check Rate CTRL Padd Min & Start
Or Increase Audio Bitrate
Or Decrease Video Bitrate

I have tried what it says but it doesnt help at all..

Anyone have any ideas?
Thanks