lpd and apsfilter

[Paulo Fonseca Jr.]

I was installed apsfilter with lpd here with printcap setting as:

lp|deskjet;r=300x300;q=draft;c=full;p=letter;m=auto:\
    :lp=/dev/ulpt0:\
    :if=/usr/local/etc/apsfilter/basedir/bin/apsfilter:\
    :sd=/var/spool/lpd/lp:\
    :lf=/var/spool/lpd/lp/log:\
    :af=/var/spool/lpd/lp/acct:\
    :mx#0:\
    :sh:

/dev/ulpt0 is recognized by usbdevs and jobs are being queued but printer not 
works, not even sign, but job are being unqueued after about few seconds.

(dmesg)
ulpt0: hp deskjet 3420, rev 2.00/1.00, addr 2, iclass 7/1
ulpt0: using bi-directional mode

Please, help me.