[Freeswitch-users] how to get leg_delay_start to work for bridge enterprise

I am try to delay the second target by 20 seconds. I used [..] and {..} but no dice. The wiki has them both for enterprise, can someone shed light on what's wrong, thanks. Main is supposed to ring, 20 secs later the second target is added while main keeps going, all timeout after a total of 43 secs. Mario G <action application="bridge" data="<originate_timeout=43,origination_caller_id_number=${caller_id_number},origination_caller_id_name=${caller_id_name}>${group_call(main@${domain_name}+E)}:_:{leg_delay_start=20}sofia/gateway/${dial_gateway}/19161234567"/>