DirectX 11 Crazy Screen tearing please help!

[Cpt.Crash]

for month's I have been trying to figure out why Tesselation mode in UDK go crazy the screen tearing is unbelievable, I still cannot find a solution can someone please offer me some advice on how to fix the problem, I have added a picture showing what happens when I use tesselation, I would really love to add tesselation effects in my game, I am running i7 950 3.1Ghz stock clock, XFX HD 5850 1GB stock clock, and 8GB of DDR3 1333Mhz Ram with Windows 7 Pro 64bit installed and have all latest updates installed. It happens to me on all version of UDK that is DX11 Compatible at moment I am running 2012 July Build. even tried it on the Feb 2012 Build still same results.

Thank You in advance.

[Cpt.Crash]

Ok I have found the solution to my problem is that you can only use tessellation on a static mesh and not on a bsp mesh haha. Still new to this dx11 features.