psql thinks we should be listening on port 5432

Hello,

I'm running postgres 8.4.5, it was bundled w/ Actuate 11 Iserver. It was
configured to run on port 8432 (not sure why or if that can be changed,
I suspect it doesn't matter in the long run). When I try to run psql, I
get this error:

/usr/local/actuate11/AcServer/postgresql/bin->psql -d ac_dr_reports

psql: could not connect to server: No such file or directory

Is the server running locally and accepting

connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

/usr/local/actuate11/AcServer/postgresql/bin->

How do I tell it to look on port 8432?

Here's the files in /tmp:

srwxrwxrwx 1 actuate actuate 0 Feb 21 15:23 .s.PGSQL.8432

-rw------- 1 actuate actuate 62 Feb 21 15:23 .s.PGSQL.8432.lock

Thanks.

Kevin