hello: I download ser with presence support from http://ftp.iptel.org/pub/ser/presence/ser-0.10.99-dev35-pa-4.1_src.tar.gz use make make install and configure my mysql server follow tutorial serctl start Starting SER : started pid(3666) I use this command to add a user serctl add 222 222 222@localhost and I get following replay MySql password: error: 500 Command 'ul_show_contact' not found here is logs in /var/log/messages Aug 2 10:49:34 liuqc dhclient: bound to 172.19.1.81 -- renewal in 3564 seconds. Aug 2 11:01:27 liuqc ser: WARNING: fix_socket_list: could not rev. resolve 172.19.1.81 Aug 2 11:01:27 liuqc ser: WARNING: fix_socket_list: could not rev. resolve 172.19.1.81 Aug 2 11:01:27 liuqc ser: init_tcp: using epoll_lt as the io watch method (auto detected) Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: AVPops - initializing Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: Maxfwd module- initializing Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: using 'none' rls-subscription authorization! Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: using 'none' subscription authorization for watcher info! Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: INFO: udp_init: SO_RCVBUF is initially 105472 Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: INFO: udp_init: SO_RCVBUF is finally 262142 Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: INFO: udp_init: SO_RCVBUF is initially 105472 Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3666]: INFO: udp_init: SO_RCVBUF is finally 262142 Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3690]: INFO: fifo_server.c:957: fifo process starting: 3690 Aug 2 11:01:27 liuqc /usr/local/sbin/ser[3690]: INFO: fifo_server.c:972: fifo server up at /tmp/ser_fifo... Aug 2 11:01:37 liuqc /usr/local/sbin/ser[3690]: ERROR: fifo_server.c:748: Command must begin with :: 222@localhost Aug 2 11:01:37 liuqc /usr/local/sbin/ser[3690]: ERROR: fifo_server.c:1061: No reply pipe (null) does someone can help me ? why does serctl add 222 222 222@localhost return error? -- trulyliu(a)gmail.com