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Central Licensing system - 0x80072efd - CLS communication Failure

Getting an error in central license status viewer and not able to read the license in Plant explorer after changin the license in to another standby server.
0x80072efd - CLS communication Failure Error returnedwhile attempting to open connection.
Checked the below things :
1.Checked for License file and CLS machine settings in License status viwer found ok.
2.Removed the CLS extensions and programs ,Uninstalled the IIS components
Reinstaled the IIS components and CLS programs & extensions.
3.Restarted the server

any suggestons

thanks..