Managed clients not connecting to ADNM

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Hoping someone can point me in the right direction. Installed the demo version of Avast and ADNM, at first things went fine. A few days goes by and I’m unable to login to ADNM, received the ‘No connection could be made because the target machine actively refused it.’ Poked around a bit, wasn’t able to get it working and no obvious error messages in the logs. I removed and reinstalled ADMN and only 7 of the 100 or so machines that were previously registered, reporting and updating are visible. I did a ‘Find Computers’ task but a bunch are missing and only a few reporting. How do I get them back and actively using ADNM?

Thanks,

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