SNMP Question

I want to monitor the number of users connected to a Firepass. I'm getting some values for the OIDs I'm looking for, they don't seem to make sense based on the OID descriptions in the FIREPASS-MIB. fp1000.3, "Stop/Start/Restart uRoam bridge", returns 96. fp1000.4, "Number of current server sessions", returns 0. fp1000.5, "Number of current desktop sessions", returns 712704. The only value that seems to correspond to the number of active network connections on the Statics page on the Firepass Management is the fp1000.3. Does anyone know the what the values really represent?