Fallo de conexión con PostgreSQL 8.3 al instalar Drupal 6.14

Hola, no consigo que Drupal conecte con PostgreSQL, inicio la instalación, después me pide el idioma y no paso de la pantalla de la base de datos.

To set up your Drupal database, enter the following information.
Database type: pgsql
The type of database your Drupal data will be stored in.
Database name: drupaldb
The name of the database your Drupal data will be stored in. It must exist on your server before Drupal can be installed.
Database username: drupalapp
Database password: drupalapp

Me salta este error:

Failed to connect to your PostgreSQL database server. PostgreSQL reports the following message: Connection failed. See log file for failure reason.

* Are you sure you have the correct username and password?
* Are you sure that you have typed the correct database hostname?
* Are you sure that the database server is running?
* Are you sure you typed the correct database name?

Ojo, el mombre de la base de datos, usuario y contraseña son correctos. Tanto con comando psql como con PGadmin me conecto:

C:\Users\josef>psql -U drupalapp -d drupaldb
Contrase±a para usuario drupalapp:
Bienvenido a psql 8.3.8, la terminal interactiva de PostgreSQL.

Tambien he probado a cambiar el parametro METHOD en pg_hba.conf

# IPv4 local connections:
host all all 127.0.0.1/32 md5
host all all 127.0.0.1/32 password
host all all 127.0.0.1/32 ident

Entorno:
GlassFish Enterprise Server v2.1
Quercus 3.2.0
PostgreSQL 8.3
Dropal 6.14

Un saludo.

Jose F.