Hello, I am testing making calls with pjsip to an authenticating proxy and everything goes fine as I'm calling pjsip_auth_clt_set_credentials. But if I need to send a REINVITE, when I call pjsip_inv_reinvite/pjsip_inv_send_msg, pjsip is not sending authentication headers when the proxy replies with '407 Proxy Authentication Required'. I even tried to call pjsip_auth_clt_set_credentials again, before calling pjsip_inv_send_msg but it doesn't work. Is there anything else I should do? regards, takeshi