to test if sessions are properly configured on your site:
1. download the sessionstest.zip
2. Unzip and manually upload (using external ftp program) or upload via EZG (using the extdocs folder, e.g. put them into it and publish)
3. Open the file session_test.php and click the link
After clicking the link you should see on another page the variables from the previous one. If they're blank, then there is something wrong with the server (probably the session_save_path is wrong).