WMP is so much like an empty case when you get it! SOunds like you need xtra codecs. http://www.free-codecs.com/ OR something like http://www.click-now.net/html/K-LiteCodecPack.htm

I should warn you, wma are not the most popular format out there! Some people even block them out of their searches! Audacity is a free audio editor that can convert to a no. of mp3 formats, & can even equalise the sound beforehand. But if you do dwnld it yu must also dwnld separately the xtras listed such as the manual & ...