IGO don't speak

Hello,
I have installed iGO on Lenovo S6000-H and i have a little problem. My iGO can’t speak or it try to do that. When the voice should come out of speaker i hear something for less than 1sec. One time after a system failure and reinstall of iGO it was working but not now. On other GPS system it is working. Only on iGO is a problem.
Someone had maybe same problem?

Best Regards.