Hi Sergio Gutiérrez, Thanks for quick reply of my mail.... my problem is when user-A online from more then machine. then user-B try to call user-A( Invite method ). openser should send invite to all the machines where User-A is online. but it's not happening...... which module i have configure for that or what parameter i have to change in which module for support this. i m using OpenSER Version 1.3.0 Configuration parameters for usrloc module modparam("usrloc", "db_mode", 2) modparam("usrloc","nat_bflag",3) modparam("usrloc", "db_url","mysql://openser:openser@localhost/openser") lookup() function::: if (!lookup("location")) { switch ($retcode) { case -1: case -3: t_newtran(); t_reply("480", "Not Available"); exit; case -2: sl_send_reply("405", "Method Not Allowed"); exit; } } Thanks & Regards, Amit vijayvargiya On Wed, 2008-05-21 at 10:02 -0500, Sergio Gutierrez wrote: