Audio and Video get asynchron

[[007_Band]]

Hi,

i got a Problem with the Audio of some avi-Videos.
The Problem is, that the Video gets behind the Audio
after a little bit of time. The Problem does not
depend on codecs or Format. It happens with
NTSC and PAL as well as mp3, wave or ac3.
All I got is that its a little bit better when i do not use
RGB mode or Overlay Mode 2 but Overlay Mode 1.
Then many movies are synchron, but some are not,
too. Then I have to use another Player, for example
the Divx-Player or the Radlight Player.

But AC3 doesn't work with this Players (on my PC)
and then it is almost impossible for me to watch the
movie. So I wanted to ask if anybody of you knows
the answer of my problem.

Ciao, Band