PHP Fatal error - install chat

Hi,

i have phpbb3.1 and php5.3 installed in ubuntu 11.10. I wanted to install the chat and i followed the instructions in this page, added the files in the forum folder and tried to open the forum/chat/install/ url. However i get the error :

javax.servlet.ServletException: java.lang.RuntimeException: PHP Fatal error: Class 'phpbb_db_tools' not found in /var/lib/tomcat7/webapps/forum/chat/install/includes/umil.php on line 159


the same issue when i try to install mod. Any idesas?

Thank you,
galatia

[IvanPF]

If you have phpBB 3.1 you must download the version 1.1.2 of the chat.

The instructions that you mentioned is for cBB Chat 1.0.1 and it's for phpBB 3.0