Canon BJC-240 refuses to print

[Julio Biason]

Hi there!

My sister got an old Canon BJC-240 to print some stuff and after
configurating it on Computer -> System Configuration -> Printing, I
could send jobs to print, but the printer doesn't print them.

So far, I saw the following:

1) I can't change the printer type (on the Connection tab on the
printer properties) to Local printer. Every time I change something
there, close the dialog and open it again, it goes to "Network 
printer: CUPS Printer (IPP)" and "URI: parallel:/dev/unknown-parallel0". 
I can even change the URI, but it will always revert back to
unknown-parallel0...

2) There is not indication of error in the cups log. The "error_log"
only shows

I [11/Nov/2004:09:54:15 -0200] Adding start banner page "none" to job
9.
I [11/Nov/2004:09:54:15 -0200] Adding end banner page "none" to job 9.
I [11/Nov/2004:09:54:15 -0200] Job 9 queued on 'BJC-240' by 'slow'.
I [11/Nov/2004:09:54:15 -0200] Started filter /usr/lib/cups/filter/pstops (PID 3822) for job 9.
I [11/Nov/2004:09:54:15 -0200] Started filter /usr/lib/cups/filter/foomatic-rip (PID 3823) for job 9.
I [11/Nov/2004:09:54:15 -0200] Started backend /usr/lib/cups/backend/parallel (PID 3824) for job 9.

3) The printer is not in pause mode.

4) I can print the test page without a problem on Windows.

Any tips?