Cpu stock cooler problem!!!!

help me please!

i'm assembling ans asus rampage extreme, the problem i'm facing is with the installation of the cpu cooler.

My quad core is 45nm so the cooler is halved... the stock package cooler i took out isnt clipping onto the motherboard... i hav a thermaltake spin-q and that fits in properly (It also has the same retention clips for the 775 as the stock cooler)

getting it to clip takes alot of force and i can see the board bending a bit while trying he stock cooler....

please help any1!