WMI/SNMP Disk monitoring

Hi,

I am new to OpManager and to the monitoring world, I've added a new server in our environnement and it was detected by OPManager and the default alarms from our templates were added. It was great news, however I am having trouble with OPManager not detecting my hardrives.

Information about my environnement:

Virtual Windows 2008 R2
Test credentials pass both for SNMP and WMI
WMI monitoring works for CPU, memory and Virual monitoring works for network, vcpu, memory
I can remote test WMI with winmgmt.msc

Error/Problem message:

SNMP Partition Details of the Device (%): Doesn't detect my harddrives, it returns me the following information "Partition Details of the Device (%)-C:\ Label:Windows2008 Serial Number 38ab33c9"
Test monitor returns : The Monitor did not respond to the test request

Trying to add WMI monitors does nothing, I check the checkbox and click add but it doesn't seem to save.

Any help or hint to resolve this problem is greatly appreciated. :)

Thank you,