Assign IP ILOM on SUN X3-2 got error

Dear All Experts,
Assign IP ILOM on SUN X3-2 got error as below:

-> cd /SP/network/
/SP/network

-> set pendingipaddress=172.16.1.1
Set 'pendingipaddress' to '172.16.1.1'

-> set pendingipgateway=172.16.1.61
Set 'pendingipgateway' to '172.16.1.61'

-> set pendingipnetmask=255.255.255.0
Set 'pendingipnetmask' to '255.255.255.0'

-> set pendingipdiscovery=static
Set 'pendingipdiscovery' to 'static'

-> set commitpending=true
set: Unable to get network management property

Please kindly give advice for this.

Thanks and regards,
Heng