create user into active directory by C#

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C#

ASP.NET

active-directory

hi
I've problem with my code . there is an error shown when i'm trying to run my code to create a user into AD.

here is the error

logon failure unknown username or bad password.

here is the code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.DirectoryServices;
using System.DirectoryServices.ActiveDirectory;
 
namespace AD
{
    public partial class NewUser : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
 
        }
 
        protected void Button1_Click(object sender, EventArgs e)
        {
            //try
            //{
            DirectoryEntry adUserFolder = new DirectoryEntry("LDAP://IP/CN=Users,DC=TEST,DC=COM", "UserName", "Password");
 
                if (adUserFolder.SchemaEntry.Name == "container")
                {
                    DirectoryEntry newUser = adUserFolder.Children.Add("CN=" + username.Text, "User");
 
                    if (DirectoryEntry.Exists(newUser.Path))
                    {
                        Label1.Text = "user name is exists";
                    }
                    else
                    {
                        newUser.Properties["samAccountName"].Value = accountname.Text;
                        newUser.Properties["givenName"].Value = firstname.Text;
                        newUser.Properties["sn"].Value = lastname.Text;
                        newUser.Properties["initials"].Value = initials.Text;
                        newUser.Properties["siplayName"].Value = displayname.Text;
                        newUser.Properties["physicalDeliveryOfficeName"].Value = officename.Text;
                        newUser.Properties["telephoneNumber"].Value = phone.Text;
                        newUser.Properties["mail"].Value = Email.Text;
 
                        newUser.CommitChanges();
                        newUser.Invoke("setpassword", password.Text);
                        newUser.Properties["userAccountControl"].Value = 0x0200;
                        newUser.CommitChanges();
                        Label1.Text = "done!";
                    }
                }
            //}
            //catch
            //{
            //    Label1.Text = "wrong!";
            //}
 
        }
    }
} 

and i'm sure that the logon info are correct.