Nsight Debugging C++ Application with Cuda Code inside

have a problem with debugging my testsuite in Visual Studio. I have a project "MainProject" and a project called "whitebox" where i wrote some tests. At this project i am calling a Cuda-Kernel written at convolution.cu at MainProject. The application works well but if i try to debug my kernel with nsight debugger it replies

Der Thread 'CUDA' (0x1) hat mit Code 0 (0x0) geendet. Das Programm "[5088] whitebox.exe: CUDA" wurde mit Code 0 (0x0) beendet.

If i open a new Cuda C project the debugging works well but i need to debug my c++ Project which includes cuda code. Any ideas?

I think my nsight user properties are correct. The path is set to the whitebox.exe. Do i have to make further settings in Visual Studio?

Thanks a lot.