vhosts and module mod_muc not working

Hi,

my ejabberd installation works now :-) - mostly. But there is one big point that confuses me:

Even I changed the settings for the mod_muc Module:

{modules,
[
....
{mod_muc, [{hosts, ["konferenz.domainA.com", "konferenco.domainB.eu"]},
{access, muc},
{access_create, muc},
{access_admin, muc_admin}]}
....
]}.

I only can access the MUC over the the standart conference.* instead of my individuel settings: konferenz.domainA.com and konferenco.domainB.eu.

Why are my settings ignored?

thanks, H.