I have a high profile customer using freepbx's HA (high availability) module. I have purchase and registered two full versions of fop2 one on each server. At some point, they become unregistered and revert back to demo mode. Is there a known procedure for installing fop2 in an HA environment? I could only find the following support:

http://forum.fop2.com/3839-fop2-and-high-availability-module/0

Is this method still valid and if so could someone show me a step by step solution. Thanks in advance.