VCard returns error (403)

Hi all. I have a problem getting the VCard of a user in my roster. When I send request by

vCard.load(xmppConn, "aUser@jabber.com");

the server returns:

<iq id=“8hnLI-54” to="me@jabber.com/myapp" from="aUser@jabber.com" type=“error”><vCard xmlns=‘vcard-temp’><FN></FN>

</vCard>

<error code=“403” type=“AUTH”><forbidden xmlns=“urn:ietf:params:xml:ns:xmpp-stanzas”/></error></iq>forbid den(403)

Is it the server or have I messed up? I am experiencing the problem for 3 days now and I haven’t changed the code - it was working fine before…