[Haskell-cafe] cabal update doesn't work on Windows XP

Hi, Has anyone managed to get cabal to run on Windows? I'm running Windows XP. There are lots of other things, including old version of Haskell tools, installed, but it's too costly to try installing cabal on a fresh machine image. Whenever I do cabal update, the response is "Unsuccessful HTTP code 403". That looks like the hackage server isn't responding, but other software tools (browsers, etc) on the computer can download the hackage database; the only program that can't get it is cabal. This problem occurs with all cabal 1.6, 1.8, with downloaded executables, with versions I've compiled, with the version in the Haskell Platform. Needless to say, these problems don't occur on Linux. Best wishes, John