Error: command "create_room" not known

I just installed ejabberd and everything went fine. I am connecting to the server from an irssi client with XMPP module enabled. Everything is fine.

I then wanted to create a room to enable multi user chat, but it seems I don't have the option when I enter ejabberdctl on the server:

ejabberdctl create_room test
Error: command "create_room" not known.

So I had a look to /etc/ejabberd/ejabberd.cfg:

%% Admins of this server are also admins of MUC service:
{access, muc_admin, [{allow, admin}]}.

%% All users are allowed to use MUC service:
{access, muc, [{allow, all}]}.

And later in the {modules} section:

{mod_muc, [
%%{host, "conference.@HOST@"},
{access, all},
{access_create, all},
{access_persistent, all},
{access_admin, muc_admin},
{max_users, 500}
]},

I don't get it at all, am I doing something wrong?