Enable Scavenging on DNS zones with script

Hi,

I would like to enable scavenging on existing DNS servers & DNS zones.

I found a script which modify the registry keys to set DefaultAgingState = 1 & aging = 1  (for the zones)  and it works ==> registry key are modified and it is activated at the server level.

But it is not applied to the dns zones, and if I restart the dns service the aging key is reset to 0.

Any idea to force the DNs server to takes its settings from the registry (for the DNs zones)?

Michael