I have two extensions.
I have enabled the ztdummy module.
I have created the conference room,
and when i get and incoming call from a destination to an extension, i get successfully connected
and then when i enter the conference room number it says the number cannot be found,
exten => s,1,Answer
exten => s,2,MeetMe()
exten => s.3,Hangup()
conf => 1234
Please give me some idea how to execute the conference call