OpenCL + nVidia nSight and Visual Profiler problems

I’m trying to get some profiling info from my OpenCl app, but fail. When using Visual Profiler, I get an error that says “Unable to collect metric and event values CUPTI_ERROR_PARAMETER_SIZE_NOT_SUFFICIENT”, when using Nsight, I get “No Events Loaded” in Collection Status and get no statistics.
I run MS VS 2010 on Win 7 x64 with GeForce GTX 550 Ti.

As I was told on nvidia forum, Parallel Nsight supports profiling only for CUDA, not OpenCL yet. But the problem with the Visual Profiler still remains unsolved.