hello world fails to run on windows

[Meurig Sage]

Hi
I installed ghc-4.08.1 earlier today on a Windows NT box. I tried out hello world. I compiled with:

ghc -O -static -o main Main.hs

Compilation went fine. But when I tried to run the program it produced no output. I then experimented further. I got TclHaskell up & running and successfully got it to produce a simple user interface. However, if I put in a call to putStr into the code the program exits prematurely. 

I'm running Windows NT, with cygwin v1.1 installed today. 

Meurig
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