[Haskell-cafe] GHCI hangs on Gtk2HS SOE on Windows, but GHC works fine?

I'm learning Haskell using Paul Hudak's book SOE. I'm using GHC 6.6 under Windows XP. GHC on Windows does not seem to come with HGL (is this correct?), so I used Gtk2HS, which contains a SOE implementation. I noticed that most programs hang when using GHCI, but they work fine with GHC. For example, the following mini program: import Graphics.SOE.Gtk main = runGraphics (openWindow "Stuck" (300,300) >>= closeWindow) completely hangs GHCI when running 'main', but using the GHC-created executable, a window correctly pops up and closes immediately, nicely returning to the command prompt. As GHCI is easier for experimenting, it would be nice if this worked. Thanks, Peter