VNQM and VOIP PRI gateways - working with cisco 3925?

Hi all,
I've recently updated to NVQM 4.1 and added all my PRI gateways into it.  PRI support looks very nice (good job guys!) - however I've found that all my Cisco 3925 gateways don't seem to show any calls at all on the E1/T1 interfaces.  They show up fine to be monitored just fine however just show 0 calls all the time.

eg

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All my other gateways using 2811 and 3825 work fine.  I guess the IOS train is slightly different on this model so maybe it's not being picked up correctly by solarwinds?  Has anyone else seen this? 

Thanks
Sean