Media key: Play, Rewind and forward not working with iTunes anymore. Other keys work normally.

It all seems to happen after using some other players, and the 3 keys (F7, F8 and F9) just don't work with iTunes anymore. Or should say they don't work with any players!

I have 2 MacBook Pro s all have the same problem.

They're not broken, but just need to be adjusted.

I found some posts, about using apps: FunctionFlip and SizzingKeys to control them binding with iTunes. I did try but one of mine Mac still not working. Besides, it's just a substitution, and you'll have to keep these two apps open.

I just want to know if there's any way to adjust it to the way it should be??????