• You have damaged: config.php file !
• File must begin with: <?php and finish with ?> with any other chars (spaces, tabs or new line) before <?php and after ?>
• You must correct the file !
• Remember it is not mistake, if your text editor can not see this space, tab or new line, use other editor with operating multi (CR/LF) format or create new file with clean content.
• Forum will not work correctly with damaged config.php file.