[Serusers] fifo question

Hi all, I am struggling arround since hours about fifo. I get all the time a syntax error. Tired several things like chmod, cr /tmp/ser_fifo as a file or directory, created a /temp/ser_fifo. Changed ser.cfg to fifo="/temp/ser_fifo" fifo_mode=0666 with / without "" does not help all the time a syntax error. Can someone explain - what fifo is (file or folder) - would gues it is a file (first in first out)? - does fifo needs to be created before? I changed /temp/ or /tmp/ to 666 but this does not help either. starting ser shows me [root@ser /]# ser -f /etc/ser/ser.cfg -c 0(8574) parse error (23,1-5): syntax error 0(8574) parse error (23,1-5): ERROR: bad config file (2 errors) wherin line 23 is the one with fifo. Kind regards Patrick # ------------- Initial global variables debug=3 fork=yes log_stderror=no listen=<ip adress> # put your real IP here port=5060 alias=sip.mycompany.com children=4 server_signature=yes dns=no rev_dns=no check_via=no syn_branch=yes memlog=1000 sip_warning=yes reply_to_via=no uid="nobody" gid="nobody" mhomed=0 fifo="/temp/ser_fifo" fifo_mode=0666 fifo_db_url="mysql://ser:heslo@localhost/ser" ************************************************************************************* The message is intended for the named addressee only and may not be disclosed to or used by anyone else, nor may it be copied in any way. The contents of this message and its attachments are confidential and may also be subject to legal privilege. If you are not the named addressee and/or have received this message in error, please advise us by e-mailing security(a)colt.net and delete the message and any attachments without retaining any copies. Internet communications are not secure and COLT does not accept responsibility for this message, its contents nor responsibility for any viruses. No contracts can be created or varied on behalf of COLT Telecommunications, its subsidiaries or affiliates ("COLT") and any other party by email Communications unless expressly agreed in writing with such other party. Please note that incoming emails will be automatically scanned to eliminate potential viruses and unsolicited promotional emails. For more information refer to www.colt.net or contact us on +44(0)20 7390 3900.