Trouble getting 100% back to stock. topic

I'm having trouble getting to complete stock, hopefully someone can point me in the right direction.

My current system:
***UNLOCKED***
S-OFF
HBOOT-1.56.0000
RADIO-1.00.20.1108
OS-4.06.651.4

I obtained S-OFF through the "firewater" method. But I'm having an issue where I'm unable to turn S-ON, and set the ***UNLOCKED*** status back to ***LOCKED***.

Whenever I set the status to "LOCKED" my OS disappears. :confused: