PMP100 AP and Setting Frequency with SNMP

I can read frequency from FSK 2.4 AP with:

snmpget -v2c -c Canopy 172.x.x.x .

SNMPv2-SMI::enterprises. = INTEGER: 2457

But I cannot set too 2457 or 2457.5 with SNMP and I get an error. How do I do this?

snmpset -v2c -c Canopy x.x.x.x . i 2457

Found this worked: