reassociating mpeg audio to .mpg video file

[AznMaverick]

it seems that in wmp9 and 10 the program is confused as to what the audio codec is. (when i check properties all i see is a -). the files play fine in wmp 6.1. how do i go about reassociating the audio codec for mpg so wmp knows what to play for sound?

 

[Nothinman]

Do you have an mpeg decoder installed? I didn't think Windows came with any by default.