Hi I'm fairly new to sip express router server so the question may have been asked before. I was used debian os,.when installation ser deb package by apt-get install ser .I find this service not really start. Info follow: *********command lines*********************** Alex:/etc/ser# /etc/init.d/ser restart Restarting ser: serListening on udp: 127.0.0.1 [127.0.0.1]:5060 udp: 192.168.10.51 [192.168.10.51]:5060 tcp: 127.0.0.1 [127.0.0.1]:5060 tcp: 192.168.10.51 [192.168.10.51]:5060 Aliases: tcp: Alex:5060 tcp: localhost:5060 tcp: localhost.localdomain:5060 udp: Alex:5060 udp: localhost:5060 udp: localhost.localdomain:5060 ****syslog************************** Feb 7 10:19:55 www /usr/sbin/ser[14827]: WARNING: destroy_fifo: cannot delete fifo (/tmp/ser_fifo): Operation not permitted (?????????????????????????????????) Feb 7 10:19:56 www /usr/sbin/ser[14865]: Maxfwd module- initializing Feb 7 10:19:56 www /usr/sbin/ser[14866]: WARNING: no fifo_db_url given - fifo DB commands disabled! (?????????????????????????????) ****/tmp/ser_fifo attribute************* Alex:/tmp# ls -l total 0 prw-rw---- 1 root root 0 2006-02-07 10:21 ser_fifo prw-rw-rw- 1 root root 0 2006-02-07 10:21 ser_receiver_14893