Having two windows to connect to the same DB

Hello, We ran into a problem concerning database connections. I'm pretty sure somebody has encountered this problem before. We're using PEAR DB, but i think it isn't related to pear db. What the application is trying to achieve is this: - on load event some javascript is fired which opens a new navigator window - this window uses the same sessionid (which is what it is supposed to do) - both windows use database connections - the code in both window is the same, that is, $db = DB::connect($dsn); Now the problem is that the first window works well but on the second window the following error shows up DB Error: connect failed [nativecode=MySQL Connection Failed: Unknown MySQL Server Host 'xxxxx' (2) ] Additionnal information: it works well under WinNT 4, Apache 1.3.22, PHP 4.1.2 but fails under Redhat 7.2, Apache 1.3.23, Php 4.1.2, Mysql 3.23.49 I guess it has something to do with threads or something but i'm new to linux and don't get it. If anybody can help that would be a relief ;)) Thanks in advance. Arnaud.