Error with Nsight for debug

I’m trying to debug my code in Visual Studio CUDA. Using CUDA 6.5 and Nsight Visual Studio Edition 4.1 When I select Start Debugging CUDA causes the following error:

A CUDA context was created on a gpu that is not currently debuggable. breakpoints will be disabled

I would greatly appreciate if you help me …

What’s your GPU? I guess your GPU is prior to Nsight 4.1. Currently Nsight 4.5 RC1 is available on website. It will support most of GPUs. Could you try it again? Thanks.