WORKAROUND
Apply attached patch.
To install:
1.Copy the existing file E:\Program Files (x86)\Quest Software\Diagnostic Server\agent\bin\jre\lib\ext\agent.jar to another directory as a backup
2.Stop the Diagnostic Server
3.Replace \Program Files (x86)\Quest Software\Diagnostic Server\agent \bin\jre\lib\ext\agent.jar with the new file
4.Start the Diagnostic Server