Configuring HTTP tunnel for URL with parameters

Hi All:

I have a requirement to test my web server with requests from different clients.

The server accepts and responds to HTTP requests like:
http://server:8080/accpro_srv/Logon?UISessionId=SN8506665X00UI024670689&DevId=SN8506665X00MNSHMX3100N
where UISessionId and DevId are dynamically generated by the client to maintain the state/uniqueness.

Steps I followed:
1. Installed Soap UI in the server (Linux box)
2. Configured the Soap UI HTTP monitor as:
Port: 8081
End Point for HTTP Tunnel: http://server:8080/accpro_srv/Logon
3. Changed the client (not a browser but another app) settings
OLD: http://server:8080/accpro_srv/Logon (the original server)
NEW: http://server:8081/accpro_srv/Logon (the tunnel port, server IP is same)
4. Connect client to server

Expected result:
Client gets the UI of the web application
Actual result:
Error page.

Is there something wrong in the settings?
Any solution to this ?

Thanks,
Ghansyam.