Unable to add server in PGadmin

Hi,<br />     I have installed postgres 8.2 on a Windows Vista machine.<br />PGAdmin came along with the installation
andon opening PgAdmin there is a POstgresSQL DATAbase Server 8.2(localhost:5432) server running on it.<br />I have
anotherwindows machine XP and i have PGadmin installaed on it too. <br />I am trying to add a server to this PGadmin so
thati can access the Vista Postgres server remotely.<br />Before when the postgres was running on a linux machine i
didnthave any problem connecting to it with  my PGAdmin client (i had the ip address of my windows XP machine in the
pg_hba.confadded). <br />I was following the same with the Vista machine too...<br />But ia m unable to connect to
WindowsVista machine from Windows XP - Pgadmin "Connection to database failed." is what i get and the add server window
popsup again. <br />I am pretty new to postgres installation on windows and is there any thing else i need to do with
theconfigurations..<br /><br />Thanks in advance,<br />Manoj<br /><br /><br />