All questions related to installations, configurations and maintenance of Advanced Host Monitor (including additional tools such as RMA for Windows, RMA Manager, Web Servie, RCC).
On the target server I only see that the Hostmon server has tried to connect with the wrong credentials.
Its not HostMonitor bug. We spent a month with this problem, our code is fine.
If you have unused RMA agents, you can install it on remote system(s) and use it for checks.