Custom editor not editing?

Hi all,

I've been trying to get a script of mine to only display some variables in the inspector if an enum is at a particular value. I see I have to use a Custom Editor to do this. I've been fiddling with one for a while now, but it doesn't seem to work at all - I don't think it's registering what script it's supposed to be editing?

Here's the PanelCustomInspector.js in the Editor folder:

 @CustomEditor(PanelController)
 
 var types : panelTypes;
 var directions : pathDirections;
 
 class PanelCustomInspector extends Editor
 {
     function OnInspectorGUI()
     {
         EditorGUILayout.LabelField("This is" , "a test.");
         target.panelType = EditorGUILayout.EnumPopup(types);
         var workaround : panelTypes = target.panelType; //[necessary][1]
         if(workaround == panelTypes.Path)
         {
             target.pathDirection = EditorGUILayout.EnumPopup(directions);
         }
     }
 }

And here's the PanelController.js in a different folder:

 var panelType = panelTypes.Buildable;
 var pathDirection = pathDirections.Right;
 
 function OnDrawGizmos()
 {
     //Draw a particular gizmo, depending on what direction the path is
 }

The editor just shows the panelType and pathDirection variables of the PanelController.js script and the test label doesn't show up. Any help would be appreciated!

[1]: http://answers.unity3d.com/questions/25453/comparing-enum-from-a-class-in-an-editor-script-do.html