radio button click event is not firing in IE7...

dears i created one website in vs2005...everything is working fine in firehost and IE8..but in IE7 some radio button click event is not firing why?......radio button source is as follows...


<asp:RadioButton ID="RadHotel" runat="server" Checked="True" GroupName="Type1" Text="Hotel" BackColor="Silver" Font-Bold="True" ForeColor="Black" AutoPostBack="True" />

<asp:RadioButton ID="RadRest" runat="server" GroupName="Type1" Text="Restaurent" BackColor="Silver" Font-Bold="True" ForeColor="Black" AutoPostBack="True" />

 Protected Sub RadHotel_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadHotel.CheckedChanged
        Response.Redirect("d1.aspx")
    End Sub

   ...