Silverlight 2.0: Cannot access Content property in a ASP.net Silverlight Control in Javascript and Web Services Problem [Async Exception]

Hi,

I'm trying to access a Silverlight control in aspx page with Javascript

I did everything I found here: http://silverlight.net/forums/p/14000/45861.aspx#45861

Unfortunately I cannot access the methods that I labeled as [ScriptableMember] in Page.xaml.cs. But the problem is that I cannot access the Content property of the Silverligh Control from Javascript.

 page .aspx
<%@ Page Language="C#" MasterPageFileGo to the complete details ...