unknown error

Hi, <p>I had to install pgsql 6.3.2. because of compatibility reasons. <br />The compiling part finishes without any
problemsand the html-access to the <br />database works, too. <br />The problem is - I cannot start the frontend psql
andhave following <br />error messages: <br />         Connection to database 'postgres' failed. <br />        
Unsupportedfrontend protocol. <p>I've never come across any of these messages before. Does anyone know what <br />they
mean?I have tried to compile pgsql with other templates, but no <br />success...:( <p>I'd be grateful for any help...
<p>Regards<br /><a href="mailto:drechsel@glamus.de">Dirk Drechsel</a><br /><a
href="mailto:webmaster@glamus.de">WebMaster</a><br/><a href="http://www.glamus.de/">Glamus GmbH</a><br />