Nvidia quadro 4000 for mac and os 10.6.8 on After Effects CS6 (11.0.2) Cuda don't work

Hi,

We bought an Nvidia Quadro 4000 for Mac for use RayTrace on After Effects CS6 (11.0.2) with our Mac Pro 5.1 on OS 10.6.8.

And the Mac lost the Cuda driver when we restart it.

We use the Nvidia driver 256.02.25f01 for Mac Os 10.6.8 and we made test on different Cuda driver (4.1.25, 4.2.10, 5.0.37 and 5.0.47).

When we install Cuda driver and start directly After Effects 11.0.2 it’s works (after effects see the GPU processor).

But when we restart the Mac and try to launch After Effects, AE doesn’t see GPU processor and ask to install Cuda driver 4.0 or later.

Do you know this problem ?

Do you have a solution ?

Thanks.

And sorry for my English !