[Serusers] why i cannot use "serctl moni"?

Hi,everyone why i cannot use "serctl moni"?I have run the command :export SIP_DOMAIN="voipv6.edu.cn". And the error is : # serctl moni Error opening ser's FIFO /tmp/ser_fifo Make sure you have line fifo=/tmp/ser_fifo in your config And I did have the line : check_via=yes # (cmd. line: -v) dns=yes # (cmd. line: -r) rev_dns=yes # (cmd. line: -R) port=5060 #children=4 fifo="/tmp/ser_fifo" what should i do to solve the problem? These are some informations related to my setting and problem: 1、operating system:Linux 7.0 2、SER distribution: ser-0.8.14_linux_i386.tar.gz _________________________________________________________________ 免费下载 MSN Explorer: http://explorer.msn.com/lccn/