Thanks for your reply,
I have 2 system with same configuration, one use Windows XP SP1 and another use Windows XP SP2. In SP1 system, when I playback, video in Monitor and PC display is syncronized, when I stop then both stop same time. In SP2 system, Video in monitor is delayed, when I stop, video in PC stop first, after about 0.5s then monitor stop.
Binh Le