I have three asterisk servers: one, two, and three. I have extensions assigned to each of the three servers: one (2XXX), two (4XXX), and three (6XXX). I had one and three servers working fine. I added server two and when I make a call from 4001 to 6001 or 2001 I get the error shown above. When I make the call from 4001 (on server two) somehow it thinks I am using the wrong username. Where does it get the username from when making a call?