Snmp nvidia error

When i do snmpwalk trying to get nvidia detials i get this message. any suggestions?

NET-SNMP-EXTEND-MIB::nsExtendOutput1Line.“nvidia” = STRING: Failed,to,initialize,NVML:,Insufficient,Permissions
NET-SNMP-EXTEND-MIB::nsExtendOutputFull.“nvidia” = STRING: Failed,to,initialize,NVML:,Insufficient,Permissions
NET-SNMP-EXTEND-MIB::nsExtendOutNumLines.“nvidia” = INTEGER: 1
NET-SNMP-EXTEND-MIB::nsExtendResult.“nvidia” = INTEGER: 0