Problem with :len command

Hello to all,
I have problem with script when I using command :len.

this is part of my script:
:if ([:len [/ip firewall connection find src-address=192.168.111.2:27005]] > 0) do={:put true} else={:put false}

Script allways print false it doesn’t matter if this ip address is in connection list ether is not.



Mikrotik is v3.

find src-address="192.168.111.2:27005"

Thanks it is working.