CiscoAnyConnect Active Sessions

You can check that your appliesto is working properly (click test applies to and click the link to view the results and ensure your new device is in there). If that's successful, that part is done.

Then you can test the active discovery to see if it's discovering anything. If that part's not working, there's a problem with SNMP or the OIDs specified in discovery aren't there on the version of the device you have (doesn't sounds like the latter should be the case).

If all that works, you can test the polling by going to the device, browsing to the datasource, then the raw data tab. Click poll now to see if you're getting data back.  If that doesn't work, then there's a problem with SNMP (permissions maybe, v3?) or the OIDs specified in the "Datapoints" section of the DS aren't correct.