Xvid files

i can't hear anything from my xvid films... i can only see the images, how can I fix this (i've tried 5 players, the same problem to all of them)... I have the xvid codec and the ffdshow codec. i don't know what to do :( ...

i'm brazilian, so many english errors may occur :oops: ;)

[adicoto]

Probably you lack an AC3 codec. Search for ac3filter and install.