STREAMING THE AUDIO CLIPS
If you are not able to stream WMA clips, it is possible that your WMA player is not associated with the files that have asx. extensions. Associating means that the program, in this case WMA player, is not a default program for the respective asx. files. If you don't get WMA player opened on your system by clicking on PLAY, but you get a text file displayed in notepad aplication, that is an indication that the files with asx. extensions are not associated with your WMA player. In order to associate them, open WMA player: tools – options – file types and then choose asf files (which also include asx files). Then clik OK, close the WMA player, and try to stream the clips again.
If you get your WMA player opened on your system by clicking on PLAY, but the error is instantly reported and the player doesn't start to buffer the clip at all, it is possible that your firewall obstructs the streaming process. After shutting down the firewall, try to stream the clips again.
Of course, there are a number
of reasons which could be responsible for a stream barrier; for all
additional problems not solvable by
the above-mentioned tips, feel free to
e-mail us
or consult directly Microsoft's
windows
media player error centre 
*...asx. files are metafiles, meaning they collect information about another file, in this case about WMA clip