[Haskell-beginners] Strange errors in network

I have problems with my nntp library (http://code.haskell.org/nntp/). If I try to list command it seems to fail. Test code:

(c,p) <- connectToHost "news.example.com" Nothing forGroups c (System.IO.putStrLn . groupName) *** Exception: : Data.ByteString.hGetLine: end of file

Conncection by telnet (according to wireshark): -> SYN <- SYN, ACK -> ACK <- NNTP Helo Message -> ACK Connection by Haskell: -> SYN <- SYN ACK -> ACK <- NNTP Helo Message -> ACK <- FIN ACK (after 10 s) -> ACK If I try to run by hand the commands in ghci I get mixed results (sometimes works sometimes it fails). What's wrong? PS. example.com is an example, non-existing domain. It is specified by a RFC to be an example domain. PPS. As I'm not subscribe the list please CC me