Unable to register UWL

Question

Hello
We are unable to register the UWL.
Following is the status of current configurations:
1. SSO works fine.
2. JCO to all systems are fine.
3. Unable to register the WebFlowConnector and AlterConnector
The WebFlowConnector has following settings:
System Alias: ECCCLNT500
Connector Type: WebFlowConnector
The error while registering WebFlowConnector is:
System ECCCLNT500: Tue Feb 16 20:14:03 EET 2010
(Connector) :com.sap.netweaver.bc.uwl.connect.ConnectorException:Tue Feb 16 20:14:03 EET 2010
: No User mapping set up for user USER.PRIVATE_DATASOURCE.un:Administrator system :ECCCLNT500
Is there any specific area to verify?
Another area, which I think is related, Connection Test for Connectors is also failing and gives SSO error. While SSO for users is activated and in working condition. The exact error while testing Connection Test for Connectors is:
Test Connection with Connector
Test Details:
The test consists of the following steps:
1. Retrieve the default alias of the system
2. Check the connection to the backend application using the connector defined in this system object
Results
Retrieval of default alias successful
Connection failed. Make sure that Single Sign-On is configured correctly
Regards
Yash

Answer 1

Finally, we got it through.
We were doing two major mistakes, and until I myself looked into we were not able to identify the root cause of problem.
The two mistakes we were doing:
1. We had a user communication uwl_service in R/3 but it was missing in portal. Even after we created it, our administrator was logged in as Admin instead of uwl_service.
2. We goofed up the Connector settings:
System Administration -> System Landscape -> Browse to your System (double click on it) -> Select Connector from the Property Catalog
0. Use appropriate group in group. Check with BASIS consultant to know correct Group.
1. In the Logical System Name type the correct Logical System Name. Check with BASIS consultant to know correct Logical System Name.
2. In the message server, instead of Hostname type the IP address of your message server. Check with BASIS consultant to know correct IP Address.
3. Remote Host Type should be set to 3 if the message server is R/3.
4. SAP Client should be client to which you want to connect in Message Server.
5. SID should be the SID of Message Server.
6. Server Port should be the correct port for Message Server. Check with BASIS consultant to know correct Port Number.
7. Rest all settings should be left to defult.
8. To know if these settings are correct, along with BASIS guy perform the following: Logon to portal with an administrator user in EP whos communication user also exist in R/3. Go to System Administration -> Support -> SAP Application -> SAP Transaction -> Select any system, type any R/3 tcode and select SAP GUI for Windows. Click Go!! You should see the TCODE Output on Screen. If yes, you configurations are correct.
It worked for us, hope it works in future for someone else too.
Would like to thank Sandeep for excellent post: /message/6787312#6787312 [original link is broken] , which helped us troubleshoot to great extent.
Thanks
Yash