Vaio-Z5 Nvidia Problem

After a long Google-Trip without any findings, I decided to look for help from you guys.
I try to play Batman Arkham Asylum, which uses Nvidia PhysX. During the Installation Process the Installer told me that I don't have the right hardware to use PhysX.
On the Nvidia homepage, it says that the 9300m gs, which is used by the Z, supports Cuda and PhysX. After a quick look in the Nvidia-Settings I saw that PhysX is installed (Systeminformation in Nvidia-Settingsmanager) Version: 909.08.14.
Running the Tool GPU-Z showed me that PhysX is not activated.
What can I do to get PhysX running????

Nvidia Driver: Original W7 64bit from Sony homepage (11.8735)

Any ideas?

 

Physix requires at least 16 shader cores, which the 9300m GS only has 8. And even if you had 16 cores, Physix would not even remotely result in a playable game. It would be like a powerpoint presentation.

 

So why does the Nvidia homepage say it does support PhysX?????

 

http://www.nvidia.com/object/product_geforce_9300m_gs_us.html

This product is also enabled for CUDA applications and is NVIDIA PhysX-ready.