Using snort in inline mode with IPFW

[Jack Mc Lauren]

Hi all
Have you guys ever tried this combination? Using snort in inline mode and IPFW as daq. 
I have added the following lines to the default /usr/local/etc/snort/snort.conf file :

config daq: ipfw
config daq_mode: inline
config policy_mode: inline

And I use the following script to run snort:

#!/bin/sh
ipfw -q delete set 10 >/dev/null 1>/dev/null 2>/dev/null
ipfw -q delete 401 >/dev/null 1>/dev/null 2>/dev/null
ipfw -q delete 402 >/dev/null 1>/dev/null 2>/dev/null
ipfw -q delete 403 >/dev/null 1>/dev/null 2>/dev/null
ipfw -q add 401 allow all from 224.0.0.0/24 to any >/dev/null 1>/dev/null 2>/dev/null
ipfw -q add 402 allow all from any to 224.0.0.0/24 >/dev/null 1>/dev/null 2>/dev/null
ipfw -q add 403 allow all from me to me >/dev/null 1>/dev/null 2>/dev/null
/bin/snort --daq ipfw --daq-var port=1500 -N -A full -l /var/log/snort/ -c /usr/local/etc/snort/snort.conf >/dev/null 1>/dev/null 2>/dev/null -q &
ipfw -q add 451 set 10 divert 1500 all from any to any >/dev/null 1>/dev/null 2>/dev/null

But it does not drop the packets.
Any suggestions or experiences ?

Thanks in advance