Acronis True Image Home Edition 2011 Unattended Install with Serial

Hello,

Our Enterprise buyed some Acronis True Image Home 2011 licenses. We are using a software distribution toy, where i want to deploy for specific computers with specific serial in unattended mode the acronis.

How should the unattended command be for an unattented installation with serialnumber?

I tried this, but it doesn't work:

msiexec /i AcronisTrueImage.msi ADDLOCAL=ALL PIDKEY=xxxxxxxx-xxxxxxx-xxxxxx-xxxxx-xxx /passive

Could you tell me whats wrong?

Greetings