cuFFT startup time

Under our actual environment (Windows 7 64 bit, P 4000, CUDA 5.0 · CUDA 7.5 combined use)
After initializing CUDPP (cudppPlan function) of 32 bit application (using CUDA 5.0, CUDPP 2.0)
The start of simpleCUFFT.exe (CUDA 7.5) seems to be delayed.
Normally it is a process that ends in an instant, but it takes over one minute when it is late.

I think that cudpp has something to do with cufft, but have any such reports been there?