facebook iframe application ,with master page, doesn't firing OnSelectedIndexChanged event
<p>this is my radio button list:</p>

<pre><code>   &lt;asp:RadioButtonList runat="server" ID="rdlTest" OnSelectedIndexChanged="rdlTst_selectedChange"&gt;
            &lt;asp:ListItem&gt;1&lt;/asp:ListItem&gt;
            &lt;asp:ListItem&gt;2&lt;/asp:ListItem&gt;
        &lt;/asp:RadioButtonList
</code></pre>

<p>this is the code behind:</p>

<pre><code>protected void rdlTst_selectedChange(object sender, EventArgs e)
    {
        Response.Write("hello");
    }
</code></pre>

<p>it's not firing the event for some reason</p>
