System Center Virtual Machine Manager 2012 error

Hi,
This deploy with SCVMM 2012 fails with this error in WinPE. Nothing seems like to work and I did a small research on the Internet. Can anyone help me please to fix this error ? What could be the problem ?
Thank you !

Error: 800b0109, A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider.
Press SHIFT+F10 to open a command windows. A trace log is available at X:VMMvmmAgentPE.exe.log. This file will be deleted when this machine reboots.
OK
