users are not able to leave comments on my blog

When visitors to my site try to leave a comment, this is the response they get. Can anyone help me figure this out? THANKS!
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Warning: require_once(../../../wp-config.php) [function.require-once]: failed to open stream: No such file or directory in /home/content/49/4803549/html/wp-content/themes/MakieDollTheme/MakieDollTheme/comments-ajax.php on line 2

Fatal error: require_once() [function.require]: Failed opening required ‘../../../wp-config.php’ (include_path=’.:/usr/local/php5/lib/php’) in /home/content/49/4803549/html/wp-content/themes/MakieDollTheme/MakieDollTheme/comments-ajax.php on line 2