Yes, my explanation was very limited. I am using a kamailio server and an Asterisk server . The extensions are registered in kamailio but the calls go to the Asterisk server. My kamailio server uses two IPs (public and local) , i use multi homed . My database is on another server. I am using version 5.4.4 of kamailio server and database . I put kamailio in subs_db_mode 3 and debug mode 3 and I do not receive any errors. publish packet are sent but no notify messages are sent to the subscribers . but i change database to local ,Everything is fine and Notify packets are sent.

# ----- presence params -----
modparam("presence", "db_url", DBURL)
modparam("presence", "db_update_period", 20)
modparam("presence", "server_address", "sip:test.test.com:5080")
modparam("presence", "send_fast_notify", 0)
modparam("presence", "db_update_period", 20)
modparam("presence", "clean_period", 40)
modparam("presence", "subs_db_mode", 3)
modparam("presence", "fetch_rows", 1000)
modparam("presence", "db_table_lock_type", 0)

# ----- presence_xml params -----
modparam("presence_xml", "db_url", DBURL)
modparam("presence_xml", "force_active", 1)

# ----- presence_dialoginfo params -----
modparam("presence_dialoginfo", "force_single_dialog", 0)

# ----- pua params -----
modparam("pua", "db_url", DBURL)
modparam("pua", "db_mode", 2)
modparam("pua", "update_period", 60)
modparam("pua", "dlginfo_increase_version", 0)
modparam("pua", "reginfo_increase_version", 0)
modparam("pua", "check_remote_contact", 1)
modparam("pua", "fetch_rows", 1000)


# ----- pua_dialoginfo params -----
modparam("pua_dialoginfo", "include_callid", 1)
modparam("pua_dialoginfo", "send_publish_flag", FLT_DLGINFO)
modparam("pua_dialoginfo", "caller_confirmed", 0)
modparam("pua_dialoginfo", "include_tags", 1)
modparam("pua_dialoginfo", "override_lifetime", 124)


# ----- pua_reginfo params -----
modparam("pua_reginfo", "default_domain", "test.test:5080")
modparam("pua_reginfo", "server_address", "test.test:5080")


#!endif

# ----- dialog params -----
modparam("dialog", "db_url", DBURL)
modparam("dialog", "enable_stats", 1)
modparam("dialog", "db_mode", 1)
modparam("dialog", "dlg_flag", FLT_DLG)