¿CustomEditor and CustomPropertyDrawe are incompatibles?

I have a Property Drawer derived class that i use for select the Layers... something like this

Code (CSharp):

1.  
2. //-------------------------------------------------
3. [CustomPropertyDrawer(typeof(LayerSelectorAttribute))]
4. //-------------------------------------------------
5. public class LayerSelectorPropertyDrawer : PropertyDrawer
6. {
7.       //some code
8. }
9.  

I use it like this:

Code (CSharp):

1.  
2. //------------------------------------------------------------------------
3. [Serializable]
4. public class DataClass
5. {
6.     [LayerSelector]
7.     public string layerName;   //--> here it does works
8.    /// more vars.....
9. }
10. //------------------------------------------------------------------------
11. public class MyClass: MonoBehaviour
12. {
13.     public DataClass dataClass;  //--> here it does works
14.     public bool disable;
15. }
16.  
17.  

i'm trying to do a CustomEditor now... like this..

Code (CSharp):

1.  
2. [CustomEditor(typeof(MyClass))]
3. public class MyClassEditor : Editor
4. {
5.     override public void OnInspectorGUI()
6.     {
7.             var myClass = target as MyClass;
8.             var dataClass = this.serializedObject.FindProperty("dataClass");
9.  
10.             myClass.disable = GUILayout.Toggle(myClass.disable, "Disable Fields");
11.             using (new EditorGUI.DisabledScope(tmyClass.disable))
12.             {              
13.                 EditorGUILayout.PropertyField(dataClass, true);       //--> here it does not  works
14.                
15.             }
16.    }
17. }
18.  

Ok, on this point i can see the instance name "dataClass" on the editor but nothing more... all variables of the class DataClass are missing/disapear...

¿Do you know if to do this is incompatible or i'm doing something wrong?

thank you so much!!