sign-out button in asp.net is not working

See more:

ASP.NET

buttons

Hi guys i have a problem with my sign-out button , i have a button named"sign-out" appears when the user enter his username and password in the pop out form and the pop up form closed.

when the user enter his name and password the 2 boxes appears one contain(LABEL) (welcome and the username of the user ) and the other box(BUTTON) is the sign-out.

my problem is when i when i click the sign-out button i don't redirect to my page again to restart the cycle or delete any sessions or cookies.
here is the code.

code for the form sign in form:

<!-- Username & Password Login form -->
			<div class="user_login">
				<form action="#">
					<label>Email / Username</label>
					<asp:TextBox ID="emailTextBox1" runat="server" MaxLength="20"></asp:TextBox>
					
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Please enter your Email/Username." ControlToValidate="emailTextBox1"></asp:RequiredFieldValidator>
                    <br />
					<label>Password</label>
					<asp:TextBox ID="passwordTextBox1" runat="server" MaxLength="20" TextMode="Password"></asp:TextBox>
					
                                        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Please enter your password." ControlToValidate="passwordTextBox1"></asp:RequiredFieldValidator>
                    <br />
                     <br />
                    
                    

					<div class="checkbox">
						<asp:CheckBox ID="remember" runat="server"></asp:CheckBox>
						<label for="remember">Remember me on this computer</label>
					</div>

					<div class="action_btns">
						<div class="one_half"><asp:Button id="backButton1"  runat="server" Text="Back"  BorderStyle="None"  CssClass="btn back_btn" EnableTheming="True" Width="150px"></asp:Button></div>
						<div class="one_half last"><asp:Button id="loginButton2"  runat="server" Text="Login"  BorderStyle="None"  CssClass="btn btn_red" EnableTheming="True" Width="140px" OnClick="loginButton2_Click"></asp:Button></div>
					</div>
				</form>

				
			</div>

code for the sign out button :

<div><asp:Button id="signout" CssClass="btn_red" runat="server" Text="Sign-Out" BorderStyle="None" OnClick="signout_Click" EnableTheming="True"  ValidateRequestMode="Enabled" /></div>

the asp.net code :

protected void loginButton2_Click(object sender, EventArgs e)
       {
           if (remember.Checked == true)
           {

               Response.Cookies["username"].Value = emailTextBox1.Text;
               Response.Cookies["username"].Expires = DateTime.Now.AddDays(15);

               Response.Cookies["password"].Value = passwordTextBox1.Text;
               Response.Cookies["password"].Expires = DateTime.Now.AddDays(15);



               if (!string.IsNullOrEmpty(emailTextBox1.Text))
               {
                   modal_trigger.Attributes["Style"] = "display:none";
                   modal_trigger2.Attributes["Style"] = "display:block";
                   modal_trigger2.Text = "welcome" + "<br/>" + emailTextBox1.Text;
                   signout.Attributes["Style"] = "display:block";
               }
           }
           else
           {
               if (!string.IsNullOrEmpty(emailTextBox1.Text))
               {
                   Session.Add("username", emailTextBox1.Text);
                   modal_trigger.Attributes["Style"] = "display:none";
                   modal_trigger2.Attributes["Style"] = "display:block";
                   modal_trigger2.Text = "welcome" + "<br/>" + Session["username"].ToString();
                   signout.Attributes["Style"] = "display:block";
               }
           }



       }

       protected void signout_Click(object sender, EventArgs e)
       {
           Response.Cookies["username"].Expires = DateTime.Now.AddDays(-1d);
           Response.Cookies["password"].Expires = DateTime.Now.AddDays(-1d);

           Response.Cookies.Remove("username");
           Response.Cookies.Remove("password");


           Session.Abandon();

           Session.Clear();
           Response.Redirect("default.aspx");

       }


   }

the login button work but the signout not working.