If you are getting the following error for your phpbb application:
Warning: Cannot modify header information - headers already sent by (output started at ......\member\mymemberID\phpBB\config.php:18) in ......\member\mymemberID\phpBB\\ncludes\sessions.php on line 182
Check to see if there is one extra line or space after the closing php script tag at the page specified (config.php in this case). Delete the extra space and it should fix the error.