WebResponse = 553 File name is not allowed

Question

Hello,

I am trying to create a backup of the file using this code block:

            FtpWebResponse webResponse = null;
            string archiveFolder = "/Archive/Tuesday/";
            string fileUri = "ftp://Test/TestDropPoint/Prod/HELLO5.TXT";
            int lastSlash = fileUri.LastIndexOf("/");

            if (lastSlash != -1)
            {
                lastSlash++;
            }

            string name = fileUri.Substring(lastSlash, fileUri.Length - lastSlash);
            FtpWebRequest webReq = (FtpWebRequest)FtpWebRequest.Create(fileUri);
            webReq.Credentials = new NetworkCredential(FtpUsername, FtpUserPassword);
            webReq.EnableSsl = FtpEnableSSL;
            webReq.UseBinary = FtpBinary;
            webReq.UsePassive = FtpUsePassive;
            webReq.KeepAlive = false;
            webReq.Method = WebRequestMethods.Ftp.Rename;
            webReq.RenameTo = archiveFolder + name;
            webReq.ConnectionGroupName = "MoveFile";
            webReq.ServicePoint.CloseConnectionGroup("MoveFile");
            webResponse = (FtpWebResponse)webReq.GetResponse();

But I receive this error: WebResponse = 553 File name is not allowed.
System.Net.WebException: The remote server returned an error: (553) File name not allowed.

Here is my reference but still didnot work: https://social.msdn.microsoft.com/Forums/en-US/8c541130-b571-4b1a-9117-ac610f3e8b34/ftpwebrequestrenameto-property?forum=netfxnetcom 

Kindly help.