luabind not making changes to pointer mingw - c++

Question

I have fixed the linker errors I had in this question, but now I am having another problem. I create my objects by calling createObject() in lua and that creates a boost::shared_ptr to a new object, adds it to a list, and returns it.
On windows with mingw when I make changes in lua the changes do not get applied to the C++ object. it cannot be a problem with my code because I built the same thing on Linux and it worked fine.
ObjectPtr createObject(PlayerPtr player){
ObjectPtr obj(new Object(player));
window->world.objects.push_back(obj);
return obj;
}
bool setup(lua_State* luastate, Window* caller){
open(luastate);
// initialize some other classes here.
class_<Player, PlayerPtr> Player("Player");
Player.def_readwrite("playerColor", &Player::playerColor);
Player.def_readwrite("displayName", &Player::displayName);
class_<Object, ObjectPtr> Object("WorldObject");
Object.def_readwrite("health", &Object::health);
Object.def_readwrite("maxHealth", &Object::maxHealth);
Object.def_readwrite("mesh", &Object::mesh);
Object.def_readwrite("location", &Object::location);
Object.property("player", &Object::getPlayer, &Object::setPlayer);
Object.def("setOnDeath", &Object::setOnDeath);
module(luastate)[
vec3,
color,
Player,
WorldObject,
def("isWindowOpen", &isWindowOpen),
def("loadMesh", &MeshManager::LoadMesh),
def("createObject", &createObject),
def("createPlayer", &createPlayer),
];
window = caller;
}
ObjectPtr and PlayerPtr are boost::shared_ptr of Object and Player, window is a static Window pointer, and createPlayer() is the same as createObject() without any arguments and using Player instead of Object.
in lua:
red = createPlayer()
red.playerColor = Color(255,0,0)
red.displayName = "Red"
obj = createObject(red)
obj.location = vec3(10,10,0)
print(obj.player.displayName)
results in "Red" being put in the console.
but in C++ the value is just "".
I debugged it and the objects do get created and added to the list in C++, but no changes were ever made, as all variables are in there default state.
I think it is a problem with luabind and mingw, or just something wrong with the build,
the only things I changed from the default build setup were 2 things I needed to do to get it to compile at all: I set LUA_PATH in the jamfile to point to the directory lua is in (rather than getting it from an environmental variable) and I changed
#elif BOOST_PP_ITERATION_FLAGS() == 1
to
#else
#if BOOST_PP_ITERATION_FLAGS() == 1
because mingw did not like the ( for some reason... (and yes I did add the #endif in the right place)
UPDATE: I have tried using msvc10 also, and it still has the same problem. I have also tried building it against the same version of boost that is on my Linux. but to no avail.