Cannot connect pgagent to remote postgres server host

My database server is installed on remote host (debian lenny)
(192.168.11.209) and I installed pgAdmin III on Windows XP (192.168.11.156).
When installing pgAgent following the steps in
http://www.pgadmin.org/docs/1.8/pgagent-install.html that is "C:\Program
Files\pgAdmin III\pgAgent" INSTALL pgAgent -u someuser -p somepassword
hostaddr=192.168.11.209 dbname=postgres user=postgres, the service is
installed. But when starting the service it sent me a system error 1069 has
occured.
What might be wrong?

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