said by k8zgw:5060 and line 2 is on 5061
Since the message is cannot connect, this would point to port 5061 is not enabled, if the PAP2 is on the same LAN or if its through a router, port 5061 is not being forwarded to the server.
So the options are
The server is not listening to port 5061
or
The network is not configured to forward/return data for port 5061