When in full screen with my X5 the video is a little lagged behind the voice and when not in full screen it's in sync, I wonder does it have anything to do with Wmp it'self or hardware?
Unfortunately, Betaplayer will not play .asx streams, only WMP will. However, when I tried it in WMP10, it would attempt to connect but would never get to the point where it could actually play, so your version of WMP actually does better than mine.