[mrtg] fwsm context traffic

[paolo]

Hi,
I use the 6500 fw service module (v3.2) and I'm trying to measure traffic in the interfaces of my virtual firewalls -contexts- using mrtg. But when the mrtg snmp poller contacts the virtual firewall, it answers that no V2 counters (high speed counters) were found despite it properly reports the interface name and speed.

Has anybody been successful in measuring traffic of this fwsm contexts using mrtg or similar? Maybe this counters are not filled by the fw and then there's no way?

thanks