To Enable SNMP Writes (snmpset):

2) Network
8) SNMP
2) SNMPv1 Specific Settings
1) SNMPv1 Access Control 1
2) Access Type   :
4) Write+
4) Accept Changes: Pending
( 4- Accept Changes: Success )
ESC+ESC+ESC+ESC+ESC
3) System
4) Tools
1) Reboot Management Interface
YES