Hello again,

i thought it could be the CODEC, because i was using a free Xvid codec, so i tried several other formats and codecs, like Microsoft MPEG4, wmv, DivX, and even an uncompressed AVI (not ulillillia's, i couldn't download that). all of them caused the same problem.
there's no problem with music files (ogg and mp3)....

i really have no idea what's going on...


Thanks again,
Filipe