[hylafax-users] sending pdf

[Thomas Hasler <thomas.hasler@xxxxxxxxx>]

HylaFax 4.2.1 under Linux version 2.6.8-2-686
 (gcc version 3.3.5 (Debian 1:3.3.5-13))

i am running a perl-script which already
sends postscript files successfully with:
my($faxcmd) = qq!/usr/bin/sendfax -n
-m -h "localhost" -s a4 $fax_header{ZEIT} -x "$fax_header{LIEFERANT}"
-f "purchasing\@knapp.com" -y "PPS-BEST:$pps_fax" -d
"$fax_header{NUMMER}" $pps_fax.faxdoc.ps!;
system("$faxcmd");

now i want to send a pdf but when i
try it with the same command i get an error: Inappropriate
"Inappropriate ioctl for device"

can anybody tell me what im doing wrong?
do i have to convert the pdf into a postscript?