Private messages delete error

I like your plugin very much and it works great but there is a big problem with private messages.
When I try to delete any of my private messages I get this error:

Warning: require_once(wpbb-delete-message.php) [function.require-once]: failed to open stream: No such file or directory in /home/entirecr/public_html/wp-content/plugins/wp-bulletin-board/php/wpbb-forum.php on line 497

And I have looked at the PHP code and it seems that the wpbb-delete-message.php file does not exist but the wpbb-forum.php requires it at line 497.

Where did the PHP file go?Right now there is no method to delete any of my private messages.

http://wordpress.org/extend/plugins/wp-bulletin-board/