test prints ok but otherwise raw ps comes out

["Robert B. Easter" <reaster@xxxxxxxxxxxxxxxx>]

The print test during SETUP worked fine, but when I print from Netscape 4.76 
or from KDE2 (kmail), I get nothing but raw postscript language on the paper.

Can anyone help me?

Slackware 7.1 (linux 2.2.17)
Apsfilter 5.4.2
a2ps 4.13
gs 6.01
(other filters, html2ps etc)
Epson Stylus Color 800 (stc800pl.upp 360x360)

Here is my /etc/printcap:
# APS1_BEGIN:printer1:stc800pl.upp:letter:default
# - don't delete start label for apsfilter printer1
# - no other printer defines between BEGIN and END LABEL
#
lp|aps1-stc800pl.upp-letter-auto-default|Printer1 stc800pl.upp letter auto 
defau
lt:\
    :lp=/dev/lp0:\
    :sd=/var/spool/lpd/printer1-stc800pl.upp-letter-auto-default:\
    :lf=/var/spool/lpd/printer1-stc800pl.upp-letter-auto-default/log:\
    :af=/var/spool/lpd/printer1-stc800pl.upp-letter-auto-default/acct:\
    
:if=/usr/local/lib/apsfilter/filter/aps1-stc800pl.upp-letter-auto-default:\
    :mx#0:\
    :sh:
raw|aps2-stc800pl.upp-letter-raw|Printer1 stc800pl.upp letter raw:\
    :lp=/dev/lp0:\
    :sd=/var/spool/lpd/printer1-stc800pl.upp-letter-raw:\
    :lf=/var/spool/lpd/printer1-stc800pl.upp-letter-raw/log:\
    :af=/var/spool/lpd/printer1-stc800pl.upp-letter-raw/acct:\
    :if=/usr/local/lib/apsfilter/filter/aps2-stc800pl.upp-letter-raw:\
    :mx#0:\
    :sh:
# APS1_END - don't delete this END LABEL for printer1