WMI for Windows Based Server Monitoring

WMI for Windows Based Server Monitoring

Hi,
 
I am using Application Manger version 9 "Manage Engine" , I want to monitor servers memory, CPU & HDD utilization for this I am trying to add servers, providing correct user credentials with NO firewall restrictions but still its shows "autentication failed"
 
Please note that I am selecting WMI option.
 
Looking forward your support and assistance in this regard.
 
-Ali Naeem
+966563172769