Unable to get interface list from node - SNMP

[djdrastic]

Hi All we are busy migrating towards NetXMS at a site and it has been mostly been smooth sailing.
However we've hit a snag when trying to monitor a Cyberoam firewall via SNMP giving us the following errors.

Poll -> Configuration

Unable to get interface list from node
Interface "unknown" is no longer exist

Poll -> Interface Names
Unable to get interface list from node

snmpwalk currently delivers the following result for .1.3.6.1.2.1.2.2.1.2

snmpwalk -c public  -v 2c x.x.x.1  .1.3.6.1.2.1.2.2.1.2

IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: ipsec0
IF-MIB::ifDescr.3 = STRING: sit0
IF-MIB::ifDescr.4 = STRING: ip6tnl0
IF-MIB::ifDescr.5 = STRING: PortA
IF-MIB::ifDescr.6 = STRING: PortB
IF-MIB::ifDescr.7 = STRING: PortC
IF-MIB::ifDescr.8 = STRING: PortD
IF-MIB::ifDescr.9 = STRING: PortE
IF-MIB::ifDescr.10 = STRING: PortF
IF-MIB::ifDescr.11 = STRING: imq0
IF-MIB::ifDescr.12 = STRING: imq1
IF-MIB::ifDescr.13 = STRING: gre0

nxsnmpwalk produces the following results querying  .1.3.6.1.2.1.2.2.1.2

nxsnmpwalk -v 2c -c public x.x.x.1 .1.3.6.1.2.1.2.2.1.2

Snippet of what it gets

.1.3.6.1.2.1.2.2.1.2.1 [STRING]: lo
.1.3.6.1.2.1.2.2.1.2.2 [STRING]: ipsec0
.1.3.6.1.2.1.2.2.1.2.3 [STRING]: sit0
.1.3.6.1.2.1.2.2.1.2.4 [STRING]: ip6tnl0
.1.3.6.1.2.1.2.2.1.2.5 [STRING]: PortA
.1.3.6.1.2.1.2.2.1.2.6 [STRING]: PortB
.1.3.6.1.2.1.2.2.1.2.7 [STRING]: PortC
.1.3.6.1.2.1.2.2.1.2.8 [STRING]: PortD
.1.3.6.1.2.1.2.2.1.2.9 [STRING]: PortE
.1.3.6.1.2.1.2.2.1.2.10 [STRING]: PortF
.1.3.6.1.2.1.2.2.1.2.11 [STRING]: imq0
.1.3.6.1.2.1.2.2.1.2.12 [STRING]: imq1
.1.3.6.1.2.1.2.2.1.2.13 [STRING]: gre0

Any input would be greatly appreciated.