discrepancy between MIB browser and new SNMP Monitor..

I'm testing OpManager build 8720.
I made a new device template in order to manage my Nokia IP390 firewalls..
I loaded into OpManager server the right MIBs (Nokia & Checkpoint)
When I try to query an IP390 by internal OpManager's MIB Browser, for and OID specific string, it returns an expected value..
But when I create a new custom monitor (such as the one called "HA Active/Passive" showed in the attahced doc ), this will not included in my Device Snapshot!!
Also integer SNMP variables gives back senseless values, as showed in second image in the attached doc. Please note that internal OpManager MIB Browser gives back coherent values..

It's a system bug?

Can you help me?

Gianluca Bona
Network & Security
AnsaldoSTS
gianluca.bona@ansaldo-sts.com