Unable to retire a server

Hi,
I have two ZCM 10 servers in my zone and I want to retire the first primary server. On the second server I type

zman zenserver-retire /Devices/Servers/zcmp0.cegepsherbrooke.qc.ca

and after typing the same credentials I use in ZCC, I get

Erreur :Impossible de trouver l'objet "/Devices/Servers/zcmp0.cegepsherbrooke.qc.ca"

ERROR: 22

(Meaning that it cannot find the object).

When I type
zman server-list -t device

the zcmp0.cegepsherbrooke.qc.ca is listed there, with folder name /Périphériques/Serveurs, so I also tried
zman zenserver-retire /Périphériques/Serveurs/zcmp0.cegepsherbrooke.qc.ca

to no avail. Thanks!