Provisioning Agent copies to machine but never launches

Hi All,

I have a couple of machines that when I launch a provisioning task against the machine it never starts.  The ldprovisioning folder is created on the C: drive and populated with the ldProvision.exe, and LaunchLdprovisionAsUser.exe.  It the creates the LaunchLdprovisionAsUser.log file with "Tue, 27 Nov 2012 11:32:03 ProcessLaunch::Launch(...) successfully" contained in the folder.  That's where it ends and goes no further.  I can run the same task against other machines and it runs fine so it isnt the provisioning task. 

Any insight would be helpful, Thank you

ZFerrini