session in php 4.2.3

Hi! I have to support a PHP-Database-solution which someone else has developed. In addition I'm quite new to php ... It uses Oracle 8 to display values out of the database. Everything is running fine with php 4.1.1. Due to security reasons I wanted to update to php 4.2.3. I use the same values within both "configure"-runs: ./configure \ --with-oci8=/oracle/product/8.1.7 \ --with-apxs=/usr/sbin/apxs \ --enable-sigchild \ --with-zlib-dir=shared \ --with-gd=/usr/ \ --with-png-dir=/usr/lib \ --without-mysql The php-scripts do the following when a user logs in:

       session_register("user","password","db");

I assume that other scripts can use this values when they query the database. A session-file is created in /tmp/. As I mentioned above everything runs fine with php 4.1.1. With php 4.2.3 the login-script is ok! When another script is called it seems like it is not able to read the "sess...."-file which exists (!) in /tmp/sess.... Could you please give me a hint what I'm doing wrong! Thanks in advance! Daniel