Remove jobs after printing

[Joao Carlos]

Hi all,

I have a cups  v 1.3.6 installed on a ubuntu v.10, kernel 2.6.22-14.
The printers are HP 1220C, driver hplib downloaded from Internet.

when I send some file to print like "lp /etc/passwd", the file is sent to the printer, the files are
created on /var/spool/cups, but this files aren't removed after printing the file and if other files
are sent to the printer, nothing is print util the old files are manually removed from /var/spool/cups.

The printers are connected to a wireless print server, on the same network

File /etc/cups/cupsd.conf
AccessLog /var/log/cups/access_log
ErrorLog /var/log/cups/error_log
LogLevel warning
PageLog /var/log/cups/page_log
Printcap /etc/printcap
PreserveJobHistory no
PreserveJobFiles no
AutoPurgeJobs yes
User lp
Group lpadmin
# Allow remote access
Port 631
Listen /var/run/cups/cups.sock
# Share local printers on the local network.
Browsing On
BrowseProtocols cups
#BrowseOrder allow,deny
BrowseAddress @LOCAL
BrowseAllow @LOCAL

Do you have any clue / tip ?