Yes the other services run without pb
it's a new install and we just update the server to vers 11.20.11922 to 11.20.12354.0 SR6.
After one restart all was OK but after the second one this service is still not started.
I will try to install .Net 4.0.
To chauhans85 i 've already done his action and it's the same state.
thanks for your help