Event Click doesn't get fired

Question

I'm trying to get fire a click event but wen I click over the dynamically button created this doesn't fire the event, I make some break points and this don't show an error or something else, I see the console of IE and doesn't show an error.

this is my code in page_load:

protected void Page_Load(object sender, EventArgs e)
        {
            if (AssignClicked)
            {
                ScriptManager.RegisterStartupScript(this, this.GetType(), "Pop", "showAndHide();", true);

                Button Btn_clic = (Button)sender;
                var name = Btn_clic.Text;

                List.ListUsers listArea = new List.ListUsers();
                List<Data.Area> Area = listArea.AreaList();

                List<Data.Area> ListOfEquiposOk = Area.Where(x => x.AREA == name && x.STANDBY == 0).ToList();

                List<Button> Botones = new List<Button>();

                var TeamFCH = ListOfEquiposOk.Select(x => x.TEAM).Distinct().ToList();

                foreach (var team in TeamFCH)
                {
                    Button newButton = new Button();
                    newButton.CommandName = "Btn" + Convert.ToString(team);
                    newButton.ID = "Btn_" + Convert.ToString(team);
                    newButton.Text = team;
                    newButton.CommandArgument = name;

                    newButton.Click += new System.EventHandler(newButton_Click);

                    newButton.OnClientClick = "return ModalGood();";
                    Botones.Add(newButton);

                    GoodPanel.Controls.Add(newButton);
                    newButton.CssClass = "btn-primary outline separate";
                }
            }    
        }

before the Page_load I make this:

public bool AssignClicked
        {
            get
            {
                return Convert.ToBoolean(ViewState["AssignClicked"]);
            }
            set
            {
                ViewState["AssignClicked"] = value;
            }
        }

Here is where I make the click that change the AssignClicked value to true:

protected void Assign_Click(object sender, EventArgs e)
        {
            AssignClicked = true;
            Page_Load(sender, e);
        }

And this is the Event of the dynamicalliy button created:

protected void newButton_Click(object sender, EventArgs e)
        {

            Button Btnclick = (Button)sender;
            var team = Btnclick.Text;
            string name = Btnclick.CommandArgument;

            List.ListUsers listArea = new List.ListUsers();
            List<Data.Area> Area = listArea.AreaList();

            List<Data.Area> ListOfToolsOk = Area.Where(x => x.AREA == name && x.TEAM == team && x.STANDBY == 0).ToList();

            var ToolArea = ListOfToolsOk.Select(x => x.TEAM);
            Grv_Eng.DataSource = ListOfToolsOk;
            Grv_Eng.DataBind();
        }

I was guided by this example LinkButton onclick event is not triggering for dynamically created buttons c#

The button that fire the event Assign_Click:

<asp:Button ID="Btn_mch" class="btn btn-primary area" Text="MCH" runat="server" Width="110px" OnClick="Assign_Click"></asp:Button>

Here is where the dynamically buttons get insert:

<asp:UpdatePanel ID="UpdatePanel3" runat="server" ControlID="Btn_eng">
            <ContentTemplate>
                <div id="tools_info" role="dialog">
                    <div class="modal-dialog modal-sm" style="width: 450px">
                        <div class="modal-content">
                            <div class="modal-header">
                                <h3 id="title-info"><span class="glyphicon glyphicon-list-alt"></span>&nbsp Tools information</h3>
                            </div>
                            <div>
                                <%--<asp:Button ID="Btn_good" Text="Good condition" CssClass="btn-link" runat="server" />--%>
                                <button id="Btn_good" class="btn-link" onclick='TableGood();'" type="button">Good Condition</button>
                                <asp:Button ID="Btn_bad" Text="Bad condition" CssClass="btn-link" runat="server" OnClientClick="TableBad();" />
                            </div>
                            <br />
                            <div class="container">
                                <div id="tgood">
                                    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                                        <ContentTemplate>
                                            <asp:Panel ID="GoodPanel" runat="server">**HERE IS WHERE BUTTONS GET ADD**</asp:Panel>
                                        </ContentTemplate>
                                        <Triggers>
                                            <asp:AsyncPostBackTrigger ControlID="Btn_eng" EventName="Click"></asp:AsyncPostBackTrigger>
                                        </Triggers>
                                    </asp:UpdatePanel>
                                </div>
                                <div id="tbad">
                                    <asp:UpdatePanel ID="UpdatePanel2" runat="server">
                                        <ContentTemplate>
                                            <asp:Panel runat="server" ID="BadPanel"></asp:Panel>
                                        </ContentTemplate>
                                        <Triggers>
                                            <asp:AsyncPostBackTrigger ControlID="Btn_bad" EventName="Click" />
                                        </Triggers>
                                    </asp:UpdatePanel>
                                </div>
                            </div>
                            <br />
                        </div>
                    </div>
                </div>
            </ContentTemplate>
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Btn_eng" EventName="Click"></asp:AsyncPostBackTrigger>
            </Triggers>
        </asp:UpdatePanel>