yes, we are running SQL Server 2005 SP1. And yes, the error msg tells that Witness sever already has a Mirror endpoint. Also if I will create endpoints in opposite...

See attached file with code and error msg.

Serv1M and Serv2W are two instances of SQL Server 2005 Standard edition on the same box.

May be I missed something during the installation...

Here is my problem. I have 3 instances of SQL Server. Two of them reside on the same physical server:

Server1 – principal database server, TCP port 1430

Server2 – mirror database...

I created named instance. So I am going to have mirror server on default SQL server and witness on named instance. But I think they should be listening to different...