No more access to Speech recognition

Hi,

I tried the Speech system on Vista (SP1 french professionnal) with the

microphones of my laptop and everything was fine. But lat week, I closed the

Speech recognition and when I want to use it again, I can't open it anymore

when I clic on "Start speech recognition" in the speech recognition options:

no more speech recognition icon in the fast starting bar and no more little

window of speech recognition on the desktop appear. What can be the problem?

Thanks for your help!