Windows Media Player 11 / my media controls

Some help would be great!

I have media controls on my keyboard, (play, pause, eject, back, forward and
volume).

When I got my com (hp pavillion 1020 n) wmp 10 was already installed. The
media controls worked for that. WMP then let me know there was an upgrade,
wmp 11. I downloaded it, but now my media controls don't work anymore except
for the volume. I just want to know if I can fix this or, how come it's like
this now?

any help would be great! thanks =)