Using GHC 6.8.2 and haddock 2.0.0.0. in WinXP (SP3) I am trying to follow instructions from "How to write a Haskell program".
Everything goes well, until I try to generate html documentation for the project. Then I get the following errors:

C:\wks\haq>runhaskell Setup.lhs haddock --executables
Preprocessing executables for haq-0.0...
Running Haddock for haq-0.0...
Preprocessing executables for haq-0.0...
Warning: Cannot read C:/usr/ghc-6.8.2/doc/libraries/base\base.haddock:
   "Magic number mismatch: couldn't load interface file: C:/usr/ghc-6.8.2/doc/li
braries/base\\base.haddock"
Skipping this interface.
Warning: main:Main: could not find link destinations for:
    GHC.IOBase.IO
haddock: internal Haddock or GHC error: c:/builds/haddock-2/install\haddock-2.0.
0.0/html/haddock.css: openFile: does not exist (No such file or directory)

Any ideas how to solve this?
Thanks!