Windows Media Player WONT OPEN

Every time i try to open windows media player 4.1.0 on my casio EM-500 it flahes the nameon the top then nothing happens. I just bought the remote earphones and now i cant use them because it doesnt work with the newer versions.
PLZ reply if you know a way to fix this problem or if you know of an update for the remote earphones
PLZ reply if you know a way to fix this problem or if you know of an update for the remote earphones
