[Freeswitch-users] Lua Retry Call if call Fail

Hi, I'm trying to use Lua to create a callflow for my call. In particular, I would like to try a call to another gateway if the first fail. I found this wiki (https://wiki.freeswitch.org/wiki/Call_retry_based_on_hangup_cause) but doesn't worked for me. What could be the right procedure? Thank you Max