[DotNetDevelopment] C# FTP upload

[JimsMind]

The code below does not succeed, I copied someones code for basic FTP
upload then attempted to add code to handle large files. If a file is
above a certain size it is supposed to upload the file in chunks of
data, the progress bar never moves and eventually the program errors
out.  I am new to c# but I thought my structure was good.  Any
suggestions would be appreciated.
     {
            //Create FTP request
            FtpWebRequest request = (FtpWebRequest)
FtpWebRequest.Create
(FTPAddress + "/" + Path.GetFileName(filePath));
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(username,
password);
            request.UsePassive = true;
            request.UseBinary = true;
            request.KeepAlive = false;
            //Load the file
            FileStream stream = File.OpenRead(filePath);
            byte[] buffer = new byte[stream.Length];
            stream.Read(buffer, 0, buffer.Length);
            stream.Close();
//Upload file
    Stream reqStream = request.GetRequestStream();
            MessageBox.Show(buffer.Length.ToString());
            if (buffer.Length < 25000)
            {
                MessageBox.Show("uploading File all at once");
                reqStream.Write(buffer, 0, buffer.Length);
            }
            else
            {
                MessageBox.Show("uploading File in pieces");
                int percM;
                percM = buffer.Length;
                for (int i = 0; i <= buffer.Length; i += 2000)
                {
                    int e;
                    int perc;
                    e = i + 1999;
                    perc = (i / percM) * 100;
                    reqStream.Write(buffer, i, e);
                    //MessageBox.Show(((i / buffer.Length) *
100).ToString());
                    progressBar1.Value = perc;
                }
            }
            reqStream.Close();
            progressBar1.Value = 100;
            MessageBox.Show("Uploaded Successfully");
        }