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Happy New Year 2014 to all !
Are the Boundaries (where the Client resides) created and assigned to a Distribution Point?
Is your deployment based on Collection with Query rules? Is so, is your Collection refresh delay short enough?
No CAS needed. CAS is required to manage multiple Primary Site. Then you can add it to your existing Site infrastructure.
To be sure, before the rollout, create a deployment that will delete the registry key.
Maybe in log files: "C:\Program Files\Microsoft Configuration Manager\Logs\smsbkup.log"