as I have learnt now, there are problems with Sockets and ghc 5.02: http://haskell.org/pipermail/glasgow-haskell-users/2001-October/001008.html Unfortunately, I am currently working on WinNT and would not like to go back and install ghc4.08. Is there an easy way to patch this problem in my 5.02 installation. Sven Eric