Netflow Analyzer not working

Netflow Analyzer not working

Hello, I have just installed Netflow analyzer (demo for 30 days) and have this message:
"OpManager has detected that it has lost network connectivity and has suspended all monitoring. Monitoring will be automatically resumed once connectivity is established"
and nothing works. I tried with win 7 and win 8 and was the same.
How can I fix it?

Thnaks in advance.
Regards.
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