Unable to Delete Interface

Unable to Delete Interface

I am having a problem with the latest version of Netflow Analyzer(4.0.2), while i can UnManage an interface but i cannot DELETE the interface. when i delete the interface in license management, after I click All devices again the interface is shown again and then i goto license management only to see it again there and Managed too even though i Unmanaged it and then deleted it.
Please tell me how to fix this problem.

Regards


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