--- /sites/all/modules/checkbox_filter/checkbox_filter_1.module
+++ /sites/all/modules/checkbox_filter/checkbox_filter.module
@@ -4,7 +4,7 @@
 /**
  * Implementation of hook_menu_alter().
  */
-function hook_perm() {
+function checkbox_filter_perm() {
   return array('show checkbox filter');
 }