Trying to get C3X working with Sipgate, I've followed these instructions: http://www.3cx.com/VOIP/ip-phone-help/Voip-provider.html But, when C3X tries to connect to Sipgate, I get "Invalid PIN". I assume that has something to do with the SIP credentials I've entered for Sipgate. I've double checked the SIP ID and password (which I'm aware aren't the same as the username/password for the Sipgate web site itself, you have to go into SIP credentials to see them). I've double checked these several times. In C3X, I don't see a place to put in a PIN. Is the PIN my SIP ID or password? I'm lost.