Did you add the public community string in the Group first?   I.E. public  If you are using Dedicated Mgmt feature, then you would put in the Management IP address, not the iSCSI discovery address.   Don 
Hi am new to DELL SAN HQ. I have installed it with version 3. I need to know what group means? and how do i add all SAN into it to monitor. Please help me out. Thanks
San Hq-Installation