Error running the sample on the target.

I installed the Nvidia Tegra Toolkit recently. I am trying to run a sample program on the Target and I get the following error.

CUDA error at …/…/common/inc/helper_cuda.h:1032 code=35(cudaErrorInsufficientDriver) “cudaGetDeviceCount(&device_count)”

Can someone help me in fixing this error.

Thanks.