Annoying FTP exception

[Lars_V_J]

I have an FTP upload:

                FtpWebRequest ftp = 

(FtpWebRequest)FtpWebRequest.Create(ftpfullpath);
                ftp.Credentials = new NetworkCredential(username, password);
                ftp.KeepAlive = true;
                ftp.UseBinary = true;
                ftp.Method = WebRequestMethods.Ftp.UploadFile;
                FileStream fs = File.OpenRead(localFilenames[0]);
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                fs.Close();
                ftpstream = ftp.GetRequestStream();
                ftpstream.Write(buffer, 0, buffer.Length);

I get an error (attachment) when I try to run the code with the following ftp path.
ftp://penappit01/usr2/unisex/modulli...76829.fejl.xml
It's driving me nuts - maybe I've just looked at it too long, but if someone out there can see what's wrong I'd appreciate it.