TREX-Name server error

Dear All,
We have configured TREX 6.1 on our Portal.
The Installation is complete & now we are carrying out the post installation activities.
We are getting the error like -
"The name server is not running or no name server is configured in TREX Service Properties."
Through Visual Administrator the TREX Service entry for name server are completed.
When I stop/start the TREX service the process for TREXNameserver is running. I then go to the Portal & click System Configuration - --TREX Monitoring the above message comes & in the Task Manager when I check the process for TREXNameserver it is not running.
Please suggest asap.
Thanks & Regards,
Sameer

Please check if you have done the below
Procedure
 1. On the portal host, edit the configuration file config_local.properties. The information below gives the respective locations of the file:
 <SAP_J2EE_Directory>>clusterserverservicesservlet_jspworkjspTempirjrootWEB-INFportalportalappscom.sap.km.applicationlib
 2. Insert the following line:
trexserver=<hostname>.<domain>
Example: trexserver=mytrexhost.mydomain.com
 3. Restart the servlet engine.
Only EP 6.0: Check the settings in the portal under System Administration → System Configuration → Service Configuration → Applications (Content Catalog) → com.sap.portal.ivs.httpservice → Services → proxy.
If a proxy server is entered there, you have to enter the TREX host in the field http Bypass Proxy Servers.
Also check if you have comfigured the below
http://help.sap.com/bp_epv260/EP_JA/documentation/How-to_Guides/14_TREX60SP1_InstallationGuidePortal.pdf
Message was edited by:
 Jayesh Ghodge
Message was edited by:
 Jayesh Ghodge

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In order to access the Visual Administrator, go to Start > Programs > SAP J2EE Engine > Visual Administrator. After you login, you will see 2 nodes i.e. Dispatcher and Server. Expand the Server node. Then go to "Services" and expand it. Then go all the way down to "TREX Service". Then on the right hand side, go to the property "nameserver.address" where you will key in "tcpip://<nameserver>:<port>". Then hit "Update" and click on the "Save" button. Then when you go to TRex Monitor, you should be able to see the Name Server running. Hope this helps.
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