Socket_process: Call rejected by www.xxx.yyy.zzz: No such context/extension

I used to know what this error message means can’t remember, any one able to decode it for me?
It occurs when I initiate a connection to a friends node… i can connect to any other nodes but get this when trying his.
GeorgeC W2DB
2360, 2428, 28599, 49089

Have your friend check his rpt.conf and extensions.conf

rpt.conf

[nodes]
; Note, if you are using automatic update for allstar link nodes,
; no allstar link nodes should be defined here. Only place a definition
; for your local nodes, and private (off of allstar link) nodes here.

2520 = radio@127.0.0.1:4569/2520,NONE
2530 = radio@127.0.0.1:4569/2530,NONE

extensions.conf with more than one node.

[radio-secure]
exten => 2520,1,rpt,2520
exten => 2530,1,rpt,2530

extensions.conf with one node.

[globals]
HOMENPA = 714 ; change this to your Area Code
NODE = 2520  ; change this to your node number

[default]
exten => i,1,Hangup

[radio-secure]
exten => ${NODE},1,rpt,${NODE}