weird problem with pgadmin & postgres on debian

<tt>hello there, <br /><br /> (it's the first time i use a mailing list...wow!)<br /> So, here's my problem: <br /><br
/>I've installed postgresql on debian as well as pgadmin(everything updated to last version).<br /> Now, when i try to
accessmy server on localhost with pgadmin, i cannot enter because it asks me the password. But i have no password, as
it'sjust a first-time learning-purpose install! If i simply leave the password field empty, it rejects my login(</tt>
<pre><font><fontface="Arial, Helvetica, sans-serif">"Error connecting to the server: fe_sendauth: no password
supplied"</font></font></pre><tt>). But, if i try to access the server with 'psql testdatabase' from a terminal, i am
ableto enter, and work normally.<br /><br /> I've also installed postgresql & pgadmin on windows xp (database
differentfrom the linux one) and pgadmin acts normally, letting me login and managing databases without any problem.<br
/><br/> What's wrong?<br /><br /> thx<br /><br /></tt>