luabind 0.8.1 + lua 5.1.4: passe d object pointers are userdata

Hello, I've faced the problem with passing registered class object's pointer to lua. It is not resolved to table somewhy. I've traced with a debugger and the algorithm seems went well - there were proper calls of lua_setmetatable and lua_settable. 

The code is like in the basic example:

class TestClass
{
public:
   TestClass() {}
   void Test() { printf("Hello\n"); }
};


   TestClass obj;

   lua_State *state = lua_open();
   luabind::open(state);

   luabind::module(state)[
      luabind::class_<TestClass>("TestClass")
         .def(luabind::constructor<>())
         .def("Test", &TestClass::Test)
   ];

   if (luaL_loadstring(state, "function main(c) c:Test() end") != 0 ||
      lua_pcall(state, 0, LUA_MULTRET, 0) != 0)
   {
      ErrorHandle(state);
   }

   if (luaL_loadstring(state, "obj = TestClass(); main(obj)") != 0 ||
      lua_pcall(state, 0, LUA_MULTRET, 0) != 0)
   {
      ErrorHandle(state);
   }

   luabind::globals(state)["tmp"] = &obj;
   if (luaL_loadstring(state, "main(tmp)") != 0 ||
      lua_pcall(state, 0, LUA_MULTRET, 0) != 0)
   {
      ErrorHandle(state);
   }

   lua_close(state);



-----------------------
Output:
Hello
[string "function main(c) c:Test() end"]:1: attempt to index local 'c' (a userda
ta value)


Could you please give me some hint how to overcome this problem? :)
Regards,
_dm


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