I am having the exact problem as this guy. Almost word for word.
I just downloaded new beta version and got the exact error = Unable to create PostgreSQL database: PT3_2009... Reason: Unable to login to database(template 1). Reason: could not connect to server: Connection refused(08000274D/10061) Is the server running on host "localhost" and accepting TCP/IP connections on port 5432?
I am running windows vista.
Please help.