[Serusers] REGISTER, INVITE and authentication

Hi, I am facing the following problem: I force a maximum of one registration per sip user ( modparam("registrar", "max_contacts", 1). I also authenticate INVITES (proxy_authorize()). When a second UA tries to register, it is denied as expected and registration fails. But when this second client places a call, it suceeds even though it is not registered (The proxy_authorize for INVITE suceeds since the credentials are good). I do not want this second client to place a call since it is not registered. I have looked at all the various functions and there seems to be no way this. Checking whether the "from" uri is registered will not help since the first client is already registered. Is there any way to handle this? Thanks ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs