Uploading a Zip File to FTP

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C#3.0

C#

I am trying to upload images to the ftp. I need to have it in a compressed folder called by a specific name and then upload that folder to a specific directory. Each time I try, I get an error The remote server returned an error: (550) File unavailable
This code works fine when I am trying to upload one image at a time. Here I am trying to upload a whole folder. I checked the uri (I copied it from the debugging) and it went there just fine. Is there a different way that I have to do the upload folders?

string ftpPassword = ConfigurationManager.AppSettings["ftpPassword"].ToString();
    string uri = remoteDirectory;
    FileInfo fileInf = new FileInfo(FileToUpload);
    // Create FtpWebRequest object from the Uri provided
    FtpWebRequest reqFTP = null;
    reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
    reqFTP.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
    reqFTP.KeepAlive = false;
    reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
    // Specify the data transfer type.
    reqFTP.UseBinary = true;
    // Notify the server about the size of the uploaded file
    reqFTP.ContentLength = fileInf.Length;
    // The buffer size is set to 2kb
    int buffLength = 2048;
    byte[] buff = new byte[buffLength];
    int contentLen;
    // open file to be uploaded
    using (FileStream fs = fileInf.OpenRead())
    {
    try
    {
    // Stream to which the file to be upload is written
    using (Stream strm = reqFTP.GetRequestStream())
    {
    // Read from the file stream 2kb at a time till Stream content ends
    contentLen = fs.Read(buff, 0, buffLength);
    while (contentLen != 0)
    {
    // Write Content from the file stream to the FTP Upload Stream
    strm.Write(buff, 0, contentLen);
    contentLen = fs.Read(buff, 0, buffLength);
    }
    }
    reqFTP = null;
    ////Update the database with the new image location and delete the img from the uploadedimages folder
    //DataAccess.UpdateImageDB(item.ProductID, item.ImgFolder + "/" + item.IMG);
    System.IO.File.Delete(fileInf.ToString());
    }
    {
    Console.WriteLine(ex.Message, "Upload Error");
    }