how do u get the rear axle off? pleas help fast thanx!

 

i realy need help!!!!! ive got the wheel's, break caleper and chain off, it looks like the sprocket and mount thing should slide off easy, but they don't i've even tryed hitting them with a hammer. i've tryed hitting the axle were the hup gpes on (on the sprocket side ) trying to knock the axle throw but still nothing[img]i/expressions/face-icon-small-confused.gif[/img]