SAP Message BCOMEC020 - User ID &1 for the external software component is invalid

Diagnosis
A user name and password are required to log on to or to work with theexternal software component. User names and passwords are maintainedin the
user-dependent settings of SAPphone and are used, forexample, when registering in a queue.
Your user name &V1& is not valid.
Further information on the external software component:
V3

System Response
The function could not be executed.

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&