Hello there,
Did you install the system management homepage? You need the System management homepage and if you have that installed please create a trust with the SIM server. You probably also need snmp or wbem support for the datasource. Snmp can be installed from windows add remove wbem is a seperate download.
Once installed check if ghe datasource is set and that you have either snmp or wbem credentials setup for the VCRM.
Kind regards,
Andrew