Before trying to unlock MikroTik devices SNMP and SSH should be enabled.
How to Enable SNMP from MikroTik cmdline:
[admin@MikroTik] > snmp
[admin@MikroTik] /snmp> set enabled yes
How to Enable MikroTik SSH:
The SSH service should be enabled by default on the RouterOS.
In case it is disabled you can enable it by issuing the following commands:
[admin@MikroTik] > /ip service enable ssh