problems in connecting to a server

Hi

I have two Debian systems, both with

psql (PostgreSQL) 7.4.2
pgadmin3 1.0.2

but in one of them (the laptop) I am unable to make a connection with
pgadmin3, I always get:

----------
2004-05-11 10:13:12 ERROR : Error connecting to the server: FATAL: IDENT
authentication failed for user "pedro"
----------

The "pedro" user has been created previously with the "createuser" command

----------
pedro(at)pcporta16:~$ psql template1
Welcome to psql 7.4.2, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

template1=> \du
List of database users
User name | User ID | Attributes
-----------+---------+----------------------------
fpam | 101 | create database
pedro | 100 | create database
postgres | 1 | superuser, create database
(3 rows)
-----------

Any help will be appreciated, thank you.

--
Pedro Henrique e Figueiredo Quaresma de Almeida