Hi hansu
You can see all these OIDs translated here:
http://www.oidview.com/mibs/14179/AIRESPACE-WIRELESS-MIB.html
In your installation you cannot use this name bsnMobileStationMacAddress if you haven´t installed AIRESPACE-WIRELESS-MIB in your PRTG ...
HI jfafinski
Have you check monitor memory usage via SNMP?
Total RAM in machine: .1.3.6.1.4.1.2021.4.5.0Total RAM used: .1.3.6.1.4.1.2021.4.6.0Total RAM Free: .1.3.6.1.4.1.2021.4.11.0
If these OIDs are not on your device, you can see the device MIB...