CUDA and Optimus driver

Can anyone please help me?

I have a notebbok asus N61Jv with Nvidia GT 325M and I cannot enable CUDA.
The specification for this card says that IT OPERATES Cuda.

After intsallation of Optimus driver nowhere can I find CUDA to enable or disable. GPU-Z indicates that there is no CUDA only PhysX. What’s wrong?

Does it mean that this card is without CUDA or the present optimus driver (I installed only this one) cannot enable it and I should wait for the next driver.

Should CUDA be always visible in the driver’s options?

I can only see PhysX- which can be enabled or disabled.

Maybe I should install also the basic driver for GT 325 M and after that Optimus driver.

Please help

I will greatly appreciate any comments.