[Samba] samba+cups: can't cancel jobs

[fabio.marcone at duet.it]

hi!
I need help abaout samba+cups: a printer admin can delete job (from a
windows client) only if he has uid 0, else receive an "Access denied"
message.
Samba log contains:
[2005/07/01 15:02:41, 0] printing/print_cups.c:cups_job_delete(339)
  Unable to cancel job 18 - client-error-not-authorized

I think it's a permissions trouble on job in directory spool:
-rw-r-----  1 root lpadmin       29168 2005-07-01 16:28 d00026-001

How I can force cups to set permission 777 (for example) ?

is there another solution?

Thanks a lot,
Fabio