[Serusers] problem with fifo server

Hello I'm trying to send a SIP-Info via the ser fifo server. This works fine for one time, but if I want to send a second message, I have to wait a certain time or I get the following errors: ------------------------- 9(12790) ERROR: fifo_server: command must begin with :: INFO 9(12790) ERROR: fifo_server: command must have at least 3 chars 9(12790) ERROR: fifo_server: command must begin with :: To: <sip:dummy@pc33.faerun.ch> 9(12790) ERROR: fifo_server: command must begin with :: Content-Type: text/plain; charset=iso8859-1 9(12790) ERROR: fifo_server: command must begin with :: And this is a text again. ------------------------ i used the following skript to get the message to the fifo: ------------------------ cat > /tmp/ser_fifo <<EOF :t_uac_dlg:hh INFO sip:dummy@pc33.faerun.ch . From: <sip:ser@faerun.ch> To: <sip:dummy@pc33.faerun.ch> Contact: <sip:devnull@pc38.faerun.ch> Content-Type: text/plain; charset=iso8859-1 . And this is a text again. . EOF -------------------------- If the message is acceptet, everything works as expected. Counting the lines in the script and comparing them to the errors, it looks as if the second time I tried to send the message the first line was consumed without being processed (by the last call?). What am I doing wrong? thanks a lot emanuel