Hogyan kell feltölteni FTP szerverre? ( C# Windows Forms Application)

Próbáltam, ezt csináltam, de a hiba nem tudom hol leledzik: (Sharp Develop 5.1-et használok)

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Windows.Forms;

using System.Net;

namespace FTP1Login

{

///

/// Description of MainForm.

///

public partial class MainForm : Form

{

string username = "CENZÚRÁZVA"; //nem mondom el, ha nem gond :D

string password = "CENZÚRÁZVA";

string URLPath = "ftp.atw.hu";

string FilePath = "C:nein.png";

public MainForm()

{

//

// The InitializeComponent() call is required for Windows Forms designer support.

//

InitializeComponent();

//

// TODO: Add constructor code after the InitializeComponent() call.

//

}

void But_loginClick(object sender, EventArgs e)

{

ConnectAndUpload();

}

private void ConnectAndUpload()

{

WebClient Client = new WebClient();

Client.Credentials = new System.Net.NetworkCredential(username, password);

Client.BaseAddress = URLPath;

Client.UploadFile(WebRequestMethods.Ftp.UploadFile, FilePath);

}

}

}