ive installed the live stream widget aliong with the other

hi, ive installed the live stream widget aliong with the other two plugins needed to run it, however when i activate the livestream widget, i get this error:

Warning: main(ROOTDIR/includes/class.phpmailer.php) [function.main]: failed to open stream: No such file or directory in /home/keropr/public_html/includes/functions.php on line 0

Warning: main(ROOTDIR/includes/class.phpmailer.php) [function.main]: failed to open stream: No such file or directory in /home/keropr/public_html/includes/functions.php on line 0

Fatal error: main() [function.require]: Failed opening required 'ROOTDIR/includes/class.phpmailer.php' (include_path='.:disappointed:usr/lib/php:disappointed:usr/local/lib/php:disappointed:home/keropr/php') in /home/keropr/public_html/includes/functions.php on line 0