For everyone thats having trouble with WMP, Try something else. WMP SUCKS, if all of you haven't figured this out yet.
Why deal with ALL OF THIS BULLS**t. There are much BETTER alternitives out there. This peice of CRAP is going to continue to give you trouble with Simple Audio Files and just wait untill you try Video Files.
It took me about 2 days to figure this out. It's not worth the trouble.
Take a look here. It's Free and probably one the best you can get.
VLC media player - Overview.
You will have to have burning software to burn with VLC, like Nero. VLC is only a media player. Still better than WMP.
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