Cuda.exe problem

Dear Nvidia CUDA C++
I have CUDA v8.0 and visual C++ 2010 upgrade from Visual C++ 2005 Professional with Win 7 Pro 64 bit
Can You explain me problem:
Nsight Debug
The Nsight debugger was not able to start because the application at path ‘C:\Projects VS 2010\CUDA hello\cuda hello\x64\Debug\cuda hello.exe’ was not found. Please verify that the application is built correctly and try again.