Port 5431 busy during boot?

[Artur]

Hi All,

I have a problem with launching Postgres on port 5431 during boot in Fedora 8.

After boot, after logging in, I can run Postgres on the port without problems.

But when I add the command (su -c 'pg_ctl ...' postgres) to /etc/rc.d/rc.local, I get "Could not bind IPv4 socket: Permission denied".
The same thing occurs when I try tu run the db via standard Postgres boot script /etc/rc.d/rc3.d/S36postgres (or renamed to /etc/rc.d/rc3.d/S99postgres).
None other postmaster is being run.
Port configured to 5432 and it works fine (but due to circumstances I need 5431, before I start trying other workarounds).

In /etc/services I found port 5431 assigned to park-agent. Is it possible that the service is running only during boot time? Can I switch it off?

Any other causes of port 5431 being busy during boot time?