[wmii] can't change modkey

hello !
After an upgrade (on debian sid), wmii 2.5.2-1, I can't change the
modkey : before, I changed it to mod4 (actually the win touch), using
xev, I tried to changed it fot 155. I've copied /etc/wmii/rc.conf in
~/.wmii/ and configured it as wanted

MODKEY=115 # modifier key used by the default key bindings

and then launched rc this way
 cd /etc/wmii/
./rc restart

and even ./rc reload ~/.wmii/rc.conf

I've even logged out and then logged in

But any change is taken

This is the log :

/etc/wmii $ ./rc restart
Stopping wmii utilities ..../rc: line 104: wmir: command not found
./rc: line 105: wmir: command not found
./rc: line 106: wmir: command not found
./rc: line 107: wmir: command not found
done.
Starting wmii utilities ..../rc: line 61: wmifs: command not found
./rc: line 62: wmikeys: command not found
./rc: line 63: wmibar: command not found
./rc: line 64: wmimenu: command not found
./rc: line 37: wmir: command not found
./rc: line 38: wmir: command not found
./rc: line 39: wmir: command not found
./rc: line 40: wmir: command not found
rc: error: couldn't read wm
./rc: line 45: : Aucun fichier ou répertoire de ce type
/etc/wmii $ ./rc reload ~/.wmii/rc.conf
rc: error: $WMII_IDENT seems to be invalid

Seems to be some issues, enit ?