Undefined Variable Warnings & Mail Settings

PHP List, I am a new PHP user and have just installed it on a Windows NT IIS Server. I have set the configuration variable display_errors = Off in the php.ini file but am still getting many of the errors shown below on the webpage generated by the discussion board application I am using PHP for which is called UBBThreads. Can anyone tell me why these are still showing up, and why do they exist at all??? My second question is how to set the configuration in the php.ini file so the board can send mail. Here are the settings that are in the php.ini file now: [mail function] ; For Win32 only. SMTP = smtp.louisville.edu ; For Win32 only. sendmail_from = carolyn.mescan@louisville.edu ; For Unix only. You may supply arguments as well (default: 'sendmail -t -i'). ;sendmail_path = Thanks for any help. Carolyn Sample of undefined constant/variable errors: PHP Warning: Use of undefined constant viewmessage - assumed 'viewmessage' in E:\inetpub\cbpa.louisville.edu\wwwroot\discussions\languages\english\online.php on line 55 PHP Warning: Use of undefined constant viewpoll - assumed 'viewpoll' in E:\inetpub\cbpa.louisville.edu\wwwroot\discussions\languages\english\online.php on line 56 PHP Warning: Use of undefined constant ubbthreads - assumed 'ubbthreads' in E:\inetpub\cbpa.louisville.edu\wwwroot\discussions\languages\english\online.php on line 57 PHP Warning: Use of undefined constant all_admin - assumed 'all_admin' in E:\inetpub\cbpa.louisville.edu\wwwroot\discussions\languages\english\online.php on line 58 PHP Warning: Use of undefined constant ONLINE_HEAD - assumed 'ONLINE_HEAD' in E:\inetpub\cbpa.louisville.edu\wwwroot\discussions\languages\english\online.php on line 59 PHP Warning: Use of undefined constant ONLINE_BODY - assumed 'ONLINE_BODY' in E:\inetpub\cbpa.louisville.edu\wwwroot\discussions\languages\english\online.php on line 60