PropertyDrawers not working with ScriptableObjects

Hi,

I have a ScriptableObject derived class called LocalPlayer.cs that is being created in an EditorWindow instance and saved as a .asset object in the Assets folder. The LocalPlayer class has the Serializable attribute, yet if I create a property drawer for that class, it does not seems to show the propery drawer GUI, but the default GUI. Does anybody know why? Thanks. FYI this is just the basis of the class, which I intend to make much more complex when this basic stuff is done. So any comments on why I use ScriptableObject are not relevant to me.

 //LocalPlayer.cs
 using UnityEngine;
 using System.Collections;
 
 [System.Serializable]
 public class LocalPlayer : ScriptableObject {
 
     public int id = -1;
 
 }
     
 //PlayerPropertyDrawer.cs (in some Editor folder ofc.)
 using UnityEngine;
 using UnityEditor;
 using System.Collections;
 using System.Collections.Generic;
 
 [CustomPropertyDrawer(typeof(LocalPlayer))]
 public class PlayerPropertyDrawer : PropertyDrawer {
 
     override public void OnGUI(Rect position, SerializedProperty serializedProperty, GUIContent label) {
         // Using BeginProperty / EndProperty on the parent property means that
         // prefab override logic works on the entire property.
         label = EditorGUI.BeginProperty(position, label, serializedProperty);
         
         // Draw label
         position = EditorGUI.PrefixLabel(position, GUIUtility.GetControlID(FocusType.Passive), label);
         // Don't make child fields be indented
         int indent = EditorGUI.indentLevel;
         EditorGUI.indentLevel = 0;
 
         // Calculate rects
         Rect playerIdRect = position;
         playerIdRect.width = position.width * 0.2f;
 
         // Draw fields - passs GUIContent.none to each so they are drawn without labels
         EditorGUI.LabelField(playerIdRect, serializedProperty.FindPropertyRelative("id").intValue.ToString());
 
         // Set indent back to what it was
         EditorGUI.indentLevel = indent;
             
         EditorGUI.EndProperty();
     }
 
 }