I am trying to monitor the number of Users per Radio interface on my Cisco 5508 WLC.  I have found the correct OID and when I use the MIB Browser, I get the correct information:

Here's a small sample output:

bsnApIfNoOfUsers.88.188.39.18.206.0.0:-->3
bsnApIfNoOfUsers.88.188.39.18.206.0.1:-->8
bsnApIfNoOfUsers.88.188.39.18.215.240.0:-->1
bsnApIfNoOfUsers.88.188.39.18.215.240.1:-->2

But when I add a new monitor to the device template and test, I always get 0 for every instance. 

Am I doing something wrong?

Thx