Hey bizibizi, I’m unaware of any current plugins for this in the plugins catalog. If anyone knows, please let me know, I’d be interested in contributing to them. In the mean time, I’ve developed a couple solutions for clients similar to this both in themes and plugins. If you’d like to talk, contact me offline. You can find me at http://consult.deardooley.com
Changing line 58 to the following will solve this problem. This should probably be recommitted back into the plugin.
header( 'Location: '.get_bloginfo('url').'/wp-login.php?redirect_to=' . $redirect_to );
