Unable to change webserver port

In the process of recovering an OpManager server that suffered a power loss. I can use OpManager from the internal client and all is well.

Server had originally been set up to use port 8081. Now it is using port 80. I did not change the port number. OpManager began using port 80 when it came back from the power loss.

Now I can't change the port number back to 8081. I run the batch file c:..\..\opmanager\bin\ ChangeWebServerPort.bat 80 8081 and I receive java errors and the port does not change even though the script says the port is changed.

The port always remains on port 80. Please help to get this back to the original port number of 8081.

netstat -a does not show anything using port 8081.