Please check the server is running properly and check the server is behind firewall and also port 445 and 135 is accessible. if the server is behind firewall and if not accessible, then open the port by configuring firewall.
Please check Dot Net platform is installed in your system. Run the utility available in the bin directory, Check_Dot_Net_version.exe , It will tell you the Dot Net version. If Dot Net platform is not available in the system, download the platform. Please see the software requirements page for downloading the platform.
Please check the following steps.
If you are getting (No error) the Windows Management Instrumentation Tester Dialog with the Enum Classes, Enum Instances, Open Namespace.etc., buttons enabled, then you can able to connect to the server. If you are getting error message then check your credentials and also ensure that wmi and RPC services are running properly in remote machine.
To monitor more servers, please visit http://www.manageengine.com/network-monitoring/download.html or send mail to