Connecting to PostgreSQL server

Hi,
I have a remote server with PostgreSQL on it.
When I try to connect via python/pygresql, I get:

pg.InternalError: could not connect to server: Connection refused
    Is the server running on host "##.##.##.###" and accepting
    TCP/IP connections on port 5432?
 
Where I've blanked out my server's ip address for obvious reasons.

I ssh'd to my server and did this to iptables:

iptables -A INPUT -p tcp --dport 5432 -j ACCEPT

restarted iptables, but still no dice.

Any advice?

Thanks in advance!
-Daniel