problem: odbc + postgres

hi,
I've got a Postgres8.2 database , an ejabberd 1.1.2 with odbc drivers on windows XP sp2.
My problem is when we add a user, a group or a chatroom, we can see the changes in the user table. But all the others tables like vcard, rostergroups seem never te be changed !?
Has anyone experienced a similar problem? Thanks in advance.

here is my configuration :
{auth_method, odbc}.
{odbc_server, {pgsql, "localhost", "postgres", "postgres", "postgres"}}.

% Used modules:
{modules,
[
{mod_register, [{access, register}]},
{mod_roster, []},
{mod_privacy, []},
{mod_adhoc, []},
{mod_configure, []}, % Depends on mod_adhoc
{mod_configure2, []},
{mod_disco, []},
{mod_stats, []},
{mod_vcard, []},
{mod_offline, []},
{mod_announce, [{access, announce}]}, % Depends on mod_adhoc
{mod_echo, [{host, "echo.localhost"}]},
{mod_private, []},
{mod_irc, []},
{mod_muc, [{access, all}, {access_create, all}, {access_admin, muc_admin}]},
{mod_pubsub, [{access_createnode, pubsub_createnode}]},
{mod_time, []},
{mod_last, []},
{mod_version, []}
]}.