Problem with the Visual Profiler Some kernels don't appear at all

Hello,

I’m having some problems with the Visual Profiler lately…
I’m using the last CUDA SDK/Toolkit and drivers for WinXP-32bit.
Some of my kernels are executed (I can check it by memcpying output), but they don’t appear in the profiler output… That’s annoying.
Has anibody experienced this before ?