[Haskell-beginners] Strange errors in network

[Maciej Piechotka]

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: <socket: 6>: 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
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