[Boost-users] Building iostreams with zlib and bzip2

I've read all the documentation on installing/building boost and iostreams. I have built and installed zlib and libbzip2 separately. I've set CPATH and LIBRARY_PATH in the environment to point to them. I'm using mingw on windows xp from the command prompt with boost 1.36. I've tried setting the variables described in the iostreams docs, but nothing happens. I've set the variables in the environment, in user-config.jam with path-constant. Nothing works, bjam always builds boost without zlib and bzip2 support, no errors. It doesn't even attempt to build support for zlib and bzip2. Please help, how do I build boost iostreams with zlib and bzip2 support? Peter McGill