In order we can find out why WPNewsman does not work on YOUR site, we need:
1) full access to your FTP server to be able to edit the wp_config.php file and enable/disable the WP_DEBUG option;
2) test admin account on your blog where you installed WPNewsman to be able to de-activate/activate all plugins;
3) access to your cPanel to see the error log.
If you have a production site and you cannot provide us with the above, please, search for the alternate plugin and do not use WPNewsman.
If you have a test site and you can give us the access to your FTP, cPanel and test admin dashboard on your WordPress, please, place a support ticket here http://support.glocksoft.net/new-ticket and send us the required information.