why my daemon did not start

[Foo JH]

Hi all, I'm trying to write a simple RC script to run my little Perl script as a daemon. The script is as follows:

#!/bin/sh

portal_enable=${portal_enable-"NO"}
portal_flags=${portal_flags-""}
portal_pidfile="/var/run/portald.pid"

. /etc/rc.subr

name="portald"
rcvar=`set_rcvar`
command="/home/admin/perfectportal/portald.pl &"

load_rc_config $name
pidfile="${portal_pidfile}"
start_cmd="echo \"Starting ${name}.\"; /usr/bin/nice -5 ${command} ${portal_flags} ${command_args}"
stop_cmd="kill `cat /var/run/portald.pid`"
run_rc_command "$1"

If I were to run this manually via 
/usr/local/etc/rc.d/portald.sh start
it works. but in a reboot, it does not start.

Can anyone guide me where to find the error message, or (even better) what may be the problem? Thanks.