SVCD playback has cubes all over the screen! please HELP

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Hi,
Hope everyone is able to help me on this one, I have AVI files created (from a DV camcorder) through MGI video, I then convert them into MPG2 through TMPEG and burn the SVCD through NERO! the thing is that when I play it back on the home DVD player, quality is amazing (very clear-not blurred at all) but I get the odd "Cubes" from time to time (every 3/4 seconds) over the screen. Could someone please tell me if I do anything wrong there, and how I could get rid of the cubes?
Thanks for helping me
Fred

[Craig Tucker]

What speed did you burn your disc at, sometimes burning at too high a speed can cause compatability problems with DVD players, this can cause picture break up, pixellation and sound sync problems.

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Cheers Craig

I have reduced the speed and it works perfectly now Thanks a lot !!