Help removing old CPU cooling system

Hi,

My old cooling system (Master Cooler liquid cooling system) is making a ton of noise and I believe has stopped working. I am stuck as to how to take off the pink piece (I believe the cooler) that is attached to my processor. Take a look at this picture of a similar model of the one I have.

http://images17.newegg.com/is/image/newegg/35-103-017-S01?$S640W$

Notice the pink piece with the two tubes? That goes on top of the processor and it is what I need to take off. It doesn't look like it is screwed in or anything, and I already removed the 4 screw metal clamp that holds it into place. It isn't budging so I am not sure how to take it off. Is there some little lever or something? Do I have to take out the processor? I notice some pins

My mobo is: Asus P5N-E SLI nForce 650i SLI and looks like this: http://hothardware.com/image_popup.aspx?image=big_2.jpg&articleid=925&t=a

Processor: Intel Core 2 Duo

Thank you so much!!!!

Anyone? It just won't come off the top of the processor chassis. :(