How can i set the Enable proprty of a Serialized Object ?

I am building a custom inspector for a component, and using serialized object and properties. I noticed that, because I am extending the Editor in my class, I can not access the “enabled” flag of my target game object. i.e.

using UnityEngine;
using UnityEditor;

[CustomEditor (typeof(FliesSystem))]
public class FliesSystemEditor : Editor {
	private SerializedObject instance; 

	public void OnEnable()
		if(instance == null) instance = new SerializedObject(target);

	public override void OnInspectorGUI()
			if (GUILayout.Button ("Pause",EditorStyles.miniButtonMid)) {

				//instance.targetObject.enabled  =true/false; I can't even cast the instance as GameObject.



Any Ideas?

Try with:

instance.FindProperty ("m_Enabled").boolValue = false;