[Plugin: Redirection] Relocate admin menu item to custom menu

Howdy,

This is an unusual request, but I’m having a bit of trouble. For various client reasons, I don’t want the link to “Redirection” to be under the “Tools” menu but under a separate menu I have created. I have been able to get this to work for several other plugins, but when I try it on yours I keep getting an error:

Fatal error: Cannot redeclare class Redirection in /home/foo/public_html/wp-content/plugins/redirection/redirection.php on line 405

The code I am using is:

if(in_array('redirection/redirection.php', apply_filters('active_plugins', get_option('active_plugins')))) {
	add_action('admin_menu','redirection_hcc');
}
function redirection_hcc() {
	add_submenu_page('hcc_misc', 'Redirection', 'Redirection', 'publish_pages', 'redirection/redirection.php');
}

Why would this be happening and how can I get it working? Thanks!