Why the event from my button is not working?

My web usercontro.ascx.cs:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class controls_Exampletry : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    public event CommandEventHandler MyButtonClicked;
    public void MyButton_Click(object sender, EventArgs e) { MyButtonClicked(sender, e); }
 
 
    public Panel StepPanel
    {
        get { return ContentPanelStep; } 
    }
 
    void MyButtonClick(object sender, EventArgs e)
    {
        //do your stuff here
    }
}
 
My .ascx from my web user control:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Exampletry.ascx.cs" Inherits="controls_Exampletry" %>
<asp:Panel ID="ContentPanelStep" runat="server">
    <asp:Button ID="Button1" runat="server" Text="Testing" OnClick="MyButton_Click" />   
</asp:Panel>
 
My ASPX.cs Page:
public partial class Insidemasterpage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
 
        HtmlTableRow stepRow = new HtmlTableRow();
        HtmlTableCell stepCell = new HtmlTableCell();
 
        controls_Exampletry myControl = (controls_Exampletry)Page.LoadControl("controls/Exampletry.ascx");
 
        myControl.MyButtonClicked += new CommandEventHandler(MyButtonClick);
 
 
 
        myControl.ID = "MyControl1";
 
        //controls_NewHireWorkflowStepControl myHeaderControl = (controls_NewHireWorkflowStepControl)Page.LoadControl("controls/NewHireWorkflowStepControl.ascx");
       // myHeaderControl.ID = "MyHeaderControl1";
        //panel1.Controls.Add(myControl);  
 
 
 
 
 
        AjaxControlToolkit.CollapsiblePanelExtender cpe1 = new AjaxControlToolkit.CollapsiblePanelExtender(); cpe1.ID = "CollapsiblePanelExtender";        
        cpe1.TargetControlID = myControl.StepPanel.ClientID;
        cpe1.SuppressPostBack = false;
 
        // cpe1.ExpandControlID = myHeaderControl.StepHeaderPanel.UniqueID;
        //cpe1.CollapseControlID = myHeaderControl.StepHeaderPanel.UniqueID;
        //cpe1.BehaviorID = "CPEBehavior";        
        // cpe1.Collapsed = true;
        //cpe1.AutoCollapse = false;
        //cpe1.AutoExpand = false;
        //cpe1.ScrollContents = false;
        //cpe1.ExpandDirection = AjaxControlToolkit.CollapsiblePanelExpandDirection.Vertical;
 
 
       // stepCell.Controls.Add(myHeaderControl);
        stepCell.Controls.Add(myControl);
        stepCell.Controls.Add(cpe1);
        stepRow.Cells.Add(stepCell);
        StepsTable.Rows.Add(stepRow);
}
}

                                              

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