can't install a distribution package using provisionning while working by scheduled task

hi everyone,

i'm unable do install a software using a provisionning task, in my SCDCLIENTHANDLER.log i get stuck to :

Sdclienthandler.exe checking for sdclient Mutex,

and still repeating this action.

for the same package, i can install it using a schedule task.

is any body can't tell me what's wrong ?