Applet - JDBC?

Greetings,
already I looked some people who work with postgresql in Brazil and not
obtained to explain me as to solve an error of connection gone off when my
applet tries to connect with postgreSQL.  A detailed description of the
error is soon to follow:

Erro: java.net.ConnectException: Connection refused: connect
Erro: Conexão negada. Verifique se o nome da máquina e a porta estão
corretos e se o postmaster está aceitando conexões TCP/IP

I am using [ PostgreSQL 8 ] and the applet meets in the following address:
http://www.ufgen.ufg.br/krub/jsp/graficos/monitoramento/ViewMonitoramento/


PS:  With the DB2 I did not have problems, however I am liking the form of
work with postgreSQL and if I not to obtain to decide this problem of
connection, go to have that to abandon postgreSQL.

In case that it will be possible to help me, I am describing still for its
analysis the archives [ pg_hba.conf ] and [ postgresql.conf ]



[pg_hba.conf]
...
# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD

# "local" is for Unix domain socket connections only
local   all         all                               trust
# IPv4 local connections:
local	all	postgres			trust
host    all     postgres         127.0.0.1	255.255.255.255          trust
host	all	all	0.0.0.0/0	trust
# IPv6 local connections:
#host    all         all         ::1/128               trust
...


[postgresql.conf]
...
listen_addresses = '*'
port = 5432
...

[Parameters that use to load the postmaster]
/usr/local/pgsql/bin/postmaster -i -p 5432 -o -e -D/usr/local/pgsql/data &

Leonardo.