I upgraded my ts3 from 3.3.x (cant remember that x) to 3.7.1

Also I'm using my own bot to manage my little community ts3 server, and I noticed my bot wouldnt move people into the afk channel (some kind of really classic automover : 30 minutes idle = automove to disgnated afk channel) for that purpose I use clientmove.

here is a typical response from the server when I try to move them away :

clientmove clid=7|clid=16 cid=30
{ id: 256, msg: 'command not found' }
which would work before the update, any ideas on why it doesnt now ?