ok ....
i think i've got the key of the problem : the matrox mystique (plain , not G200) DO NOT feature the overlay !!!!!
i found it on (when the link is ok) :
http://www.trends.in-sync.com/online...Card_Table.htm
adicoto: your last post make me feel pretty much down : the crappy card i've got is almost the only one which doesn't allow bsplayer to work !
if anyone got more info on this card (upgrades, drivers or so on...) , let me know about !
fedhman kassad from hyperion