Hi, I'm fairly sure my problem lies with my voip provider VoipTalk but wonder if you could help me understand a couple of things. My config is very simple, I'm using freeswitch to accept incoming calls via a voip gateway and record messages. Here's the problem: - When freeswitch starts the gateways are all created and register correctly - I have the ping parameter set to make sure the gateway stays alive. - The first time freeswitch pings the gateway it fails even though the registration appears intact as calls are still coming through to freeswitch - Freeswitch then tries to re-register the gateway but this fails. The SIP trace shows an Unauthorized message and the actual log entry is 'Registration Failed with status Operation has no matching challenge [904]' - eventually the registration times out with my provider and all is lost. - if I call 'sofia profile external restart' or restart the software this fixes the problem My questions are: 1) Why would the ping fail when the registration appears to be intact? 2) Whay would the auto re-register not work but a restart would? This ones driving me nuts so any help greatly appreciated. regards Andy