Sometimes Media Player doesn't shut down all the way, even though you no longer see a window for it in the taskbar (the process stays running). Take a look with Task Manager (right click on an empty part of the taskbar and select Task Manager) by going to the Processes tab and sorting the list by process name (click the Image Name column). If wmplayer.exe is listed towards the bottom, click on it, then click End Process and confirm that you want to terminate it. Then try playing your wma file again.

my media player doesnt work right either i put a cd in it wont come out
it takes a few tries also my media player stops responding grrrrrrrrrrrr this is only afterr i had it fixed and returned