windows med pl. won't play my LW/wmp songs

[avasa87]

when i download music, it frequently comes up wmp format. i haven't figured out how to play these songs yet. when i click play, my wind med p. pops up then it says downloading media usage rights then i get a advertisment for some program they want you to download. i've tried everything i can think of to fix this prob and failed. does anyone know how to fix this i have wind.xp and my lime wire is working with i tunes with no problems there. much of the music i find i can't listen to because my limewire and my itunes won't play it. i've searched for a solution on the net and i went thru the LW manual with no success i've made a mistake the format that keeps comming up is called wma