Problems installing Zalman CNPS12X Cooler

I bought last week your CNPS12X after reading a lot of successfully reviews. http://www.zalman.com/ENG/product/Product_Read.asp?idx=...

I then proceeded to install this on a LGA1155 Socket AsRock Extreme69 motherboard http://www.asrock.com/mb/overview.asp?Model=P67 Extreme6&cat=Specifications


I have just installed the Zalman CNPS12X Cooler on a LGA1155 Socket AsRock Extreme69 motherboard.

After installing it and following the instructions I am still able to twist the cooler easily on its axis. Is this normal!!??
Looking at Page 10 of the manual http://www.zalman.com/eng/product/Product_Read.asp?idx=... (CNPS12X_Eng_Ver1.0[1].pdf )
The problem I see is as follows, on the heat sink I have ( so I may have a faulty one??)

The Clip goes into the hole of the Heatsink’s base but it does not fully go in, it sticks out to such an extent that the top part of the Clip is never in contact
With the heatsink base. Either the hole in my Heatsink base is not deep enough, or the part of the clip that goes into the Base is too long.

The Heat sink is therefore allowed free to pivot (when a little force is applied) on its axis.
The Clip is able to secure in it vertically down but it does not prevent lateral movement.

Is this normal???

This caused me great consternation to the end that the bolt heads have become worn as I have tightened this as much as I can , and took out and started again so many times to no avail. I’ve looked at You Tube and read the manual so many times.
Have I done something Wrong or do I have a Clip from another Zalman product? Has anyone else similar experience?


Please help.

Thanks.