[Serusers] IM problem.

[Kong]

I am trying to implement Messaging from serweb to UA, but not a success.

i have this script in my ser.cfg

   if (!lookup("location")) {
     if (method == "MESSAGE") {
       if (!t_newtran()) {
           sl_reply_error();
           break;
       };

       if (m_store("0")) {
         t_reply("202", "Accepted for Later Delivery");
         break;
       };
     };

     sl_send_reply("404", "User Not Found !");
     break;
   };

but i read somewhere in google that i need to add in this line.
modparam("msilo", "registrar", "sip:registrar at iptel.org")
so that the UA will be notify if there is any new message.

If i don't add this line, the message can be send from serweb to the 
account (which stored in SILO) then can be checked from the recipient 
serweb account. But once i add the registrar line in, the sending process 
return error code of 405 timeout. can i know whats the problem here?

i am using ser-0.9.3

thank you. 
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