Cannot call function in unity fro web browser.

Unity Engine
1

I can call a javascript defined on the webpage and that works fine. But I cannot Call a function in my gameobject from the webpage.

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;

public class APIManager : MonoBehaviour 
{
	static public APIManager instance;
	private string PageData;


	void Awake()
	{
		DontDestroyOnLoad(gameObject);
		instance = this;	
	}
	void Start()
	{
		Application.ExternalCall("SendUnityFBInfo");
	}
	void RecieveInfo(string data)
	{
		Debug.Log(data);
		PageData = data;
	}
	void OnGUI()
	{
		GUI.depth = 0;
		GUI.Label(new Rect(0, 0, 200, 20),  "Data:" + PageData);
	}

}

	<script type="text/javascript">
	function GetUnity() 
	{
		if (typeof unityObject != "undefined") {
			return unityObject.getObjectById("unityPlayer");
		}
		return null;
	}
	if (typeof unityObject != "undefined") {
		unityObject.embedUnity("unityPlayer", "WebPlayer.unity3d", 800, 600);
		
	}


	function SendUnityFBInfo()
	{
		var response = "test";
		alert(response);
		var unity = unityObject.getObjectById("UnityContent");
		unity.SendMessage("APIManager", "RecieveInfo", response);
		
	}
	
	
	</script>

When I load my game i get the alert of “test” but in unity window my label just shows Data:

2

I changed unity.SendMessage… to GetUnity().SendMessage(“APIManager”, “RecieveInfo”, response); and it works now