SAP Message BCOMEC013 - The connection &1 is not yet registered

Diagnosis
The required function can only be executed on a registered connection.Your connection &V1& is not yet registered on the external softwarecomponent.
Further information on the external software component:
V3

System Response
The function was not executed.

Procedure
First, call the function 'register'.

Procedure for System Administration
The error can occur in 2 different places:
1. In the connected gateway
2. In the underlying CTI software
In this case the error occurred in (&V4&).
The return code for the underlying CTI software is: &V2&