Capturing User Control Event from Parent Page (.aspx)

I have 2 issues with my code below.

1) I am not able to get the rbtnRequestType_OnSelectedIndexChange method below in my user control to fire when I change selected values in the radiobuttonlist at runtime.  Do I need force a postback or something in my OnSelectedIndexChange event or something?

Note:  however, if I have some other control on the page such as a button adn click that, it forces a postback and the method then fires off fine but I don't know why it does not invoke that method when kust changing values in the radiobuttonlist to begin with.

2) When I do get the  rbtnRequestType1_OnSelectedIndexChange1 method to fire, it runs RequestType.cpeRequestType1.Collapsed = true; but then goes back to running rbtnRequestType_OnSelectedIndexChange again and I'm not sure.  But at runtime, I am not seeing that panel collapsing so not sure why.

Here is what I've tried so far:

----------------------
MyPage.aspx.cs:
----------------------

public partial class RequestPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

        RequestType.rbtnRequestType_OnSelectedIndexChange1 += new EventHandler(rbtnRequestType1_OnSelectedIndexChange1);

 ...

    private void rbtnRequestType1_OnSelectedIndexChange1(object sender, EventArgs e)
    {
        if (RequestType.rbtnRequestType1.SelectedIndexChanged == 0)
        {
                           RequestType.cpeRequestType1.Collapsed = true;

        }
    }

 
----------------------
MyControl.ascx:
----------------------
                                                <td>
                                                    <asp:RadioButtonList ID="rbtnRequestType" OnSelectedIndexChanged="rbtnRequestType_OnSelectedIndexChange" runat="server" >
                                                        <asp:ListItem Text="New User" Value="NewUser" Selected="true" />
                                                        <asp:ListItem Text="Existing User" Value="ExistingUser" Selected="false" />
                                                        <asp:ListItem Text="Multiple Users" Value="MultiUser" Selected="false" />
                                                        <asp:ListItem Text="New System Account" Selected="false" />
                                                        <asp:ListItem Text="Existing System Account" Selected="false" />
                                                        <asp:ListItem Text="Multiple System Accounts" Selected="false" />
                                                    </asp:RadioButtonList>
                                                </td>

--------------------------
MyControl.ascx.cs:
--------------------------

        #region public events

            public event EventHandler rbtnRequestType_OnSelectedIndexChange1;
            private void rbtnRequestType_OnSelectedIndexChange(object sender, EventArgs e)
            {
                if (rbtnRequestType_OnSelectedIndexChange1 != null)
                {
                    rbtnRequestType_OnSelectedIndexChange1(this, e);
                }
            }

        #endregionStart Free Trial