I can't music, now that I hook up to DSL.?

I used to hear music from Korean Broadcasting when I hook up to AOL dialup. Now I switched to AT&T Yahoo DSL, I got this message: The file you are attempting to play has an extension (.wma) that do esnot match file format. I don't get this message when I'm with AOL and it work fine then. The DSL suppososed to be faster than dial-up and I can hear now.