SNMP ReadyNAS 2100 and 2120

Hi

I am trying to setup SNMP monitoring on a couple of our NAS boxes to our monitoring system (MaxFocus) but I am having a struggle getting this to work.

I have enabld SNMP on the NAS nox and specified the IP address of the machine I am trying communicate too.

When I run any checks on the NAS box I receive error stating No Such Object which is referring to the OID check, below are a few examples of the OID I am running:

Volume 1 - free space -  1.3.6.1.4.1.4526.18.7.1.6

Volume 1 - Status - 1.3.6.1.4.1.4526.18.7.1.4

Disk1 State - 1.3.6.1.4.1.4526.18.3.1.4

These are predefined on MaxFocus under Netgear ready nas, however after speaking to support they have advised these codes could be wrong as manufactures changes these.

i have looked online and i can't find any different codes to run.  

Any help would be appreciated.

Thanks