Try to send a PR using send-pr. If you get error replies,
investigate the causes. See E-Mail.
Does a new file show up in the gnats-queue directory of your
database, with the report as its contents?
If it does, make sure you have created the cron job for this database.
If the report does not show up in the gnats-queue of the desired
database, does it show up in the gnats-queue directory of another
database?
In this case, make sure your mail aliases are set up correctly;
especially, make sure that you have specified the correct
--directory option (--database for gnats 4.x)
for each queue-pr.