Errors using connectTo in Sockets

Hi! Does anyone know why I can't use the connectTo function in the library Socket included with ghc? If I try to run the following code: Prelude> Socket.connectTo "193.237.240.100" (Socket.PortNumber 21) I get the following error: *** Exception: invalid argument Action: getSocketOption Reason: Invalid argument I'm trying to connect to a ftp-server. I can see on the server that a connection is made, but the haskell program crashes. I have also tried to connect to a webserver, but that generates the same error. Process> Socket.connectTo "hem.passagen.se" (Socket.Service "http") *** Exception: invalid argument Action: getSocketOption Reason: Invalid argument Thanks, Peter Logarn