I have The Dude installed on x86 v5.26. I upgraded 433AH to v6.10 from v5.26 and after that i have error "snmp connection refused". Also i got this error when i try snmp on v6.6. It looks like MikroTik have some bug in snmp in version 6....Snmp on versions 4 and 5 works great. Does anyone have similar problem or know how to fix this problem? Or fix will be downgrade to v5.26...

Edit: I didnt upgrade firmware to v3.10 i is v2.28

Can you post your snmp settings both versions?