[Plugin: RecipePress] Recipe Press

Upon activation of Recipe Press, it disables my entire wordpress until I delete the plugin from my server.

Error returned:

Fatal error: Cannot redeclare class Walker_RP_Taxonomy in /home/moneysit/public_html/freerecipenetwork.com/wp-content/plugins/recipe-press/classes/custom-walkers.php on line 166

http://wordpress.org/extend/plugins/recipe-press/