autoresponder failure

Hey Gang!
Can someone take a look at this code, I've stared at it for four hours
(and amended it several times until its present form).
It's not working, but syntactically I believe it's OK. Ack...

 VERBOSE=ON
 MAILDIR=/var/mail
 PMDIR=$HOME/Procmail
 LOGFILE=$HOME/Procmail/log
 FILEDIR=$HOME/autores

#Deal with the mail loop issue first
 :0
 * !^FROM_DAEMON
 * !^x-Loop: my_user(_at_)dufus(_dot_)net
 {
#Inform sender that address has changed using info.txt
   :0 h c
   | (formail -rt -A "Precedence: junk" \
                  -A "X-Loop: my_user(_at_)dufus(_dot_)net" ; \
       cat $FILEDIR/info.txt) \
     | $SENDMAIL -t
#now forward the mail to the user's new address
   :0 c
   ! my_user(_at_)other_address(_dot_)com
 }   
#great, except it's not working at all (:

Any ideas anyone?
Regards,
-Colin