[Haskell-cafe] FW: upload file with ftp

[Kees Bleijenberg]

I want to upload a file with ftp using library Network.FTP.Client.
The OS is Windows 64 and ghc version is 8.6.4.

This is the code:

import System.FilePath.Windows
import Network.FTP.Client
import qualified Data.ByteString as B
....
testFtp :: IO (Either String ())
testFtp = do
   let host = "copecco"  -- this is from my hosts file       
       username = ****
       pwd = ****
       ftpDir = "registratie"
       fileToSend = "globals.pas"  -- a test text file
   putStrLn $ "Connect to " ++ host
   withFTP host 21 $ \h ftpResponse -> do 
         print ftpResponse
         if frStatus ftpResponse == Success 
         then do 
                  putStrLn "Connected"
                  loginResp <- login h username pwd
                  print loginResp
                  if frStatus loginResp == Success
                  then do 
                           putStrLn $ "Change directory to " ++ ftpDir
                           cwdResp <- cwd h ftpDir
                           print cwdResp
                           if frStatus cwdResp == Success 
                           then do  
                                    putStrLn "Read file from disk"
                                    let ftpFn =  takeFileName fileToSend 
                                    fileContents <- B.readFile fileToSend 
                                    putStrLn $ "File size: " ++ show
(B.length fileContents) ++ " bytes"
                                    stor h ftpFn fileContents TI
                                    return $ Right ()
                           else return $ Left $ "Ftp error cwd. Code: " ++
show (frCode ftpResponse)
                  else return $ Left $ "Ftp error login. Code: " ++ show
(frCode ftpResponse)
         else return $ Left $ "Connect to host " ++ host  ++ " failed. Code:
" ++ show (frCode ftpResponse)

This is the response:
Connect to copecco

220 (vsFTPd 3.0.2)

Connected

230 Login successful.

Change directory to registratie

250 Directory successfully changed.

Read file

File size: 27015 bytes

*** Exception: Network.Socket.connect: <socket: 444>: failed (Connection
timed out (WSAETIMEDOUT))  

Everything works fine until the stor commmand. 
When I upload the same file with another ftp client program everything works
(no permission problems).

What is wrong and how do I get the result codes for the stor command?

Kees