Emscripten, Embind, Error: no instance of constructor

I am trying to convert classes (and structs) from C++ to Javascript using Emscripten. For this I want to use Embind. I am trying to convert a very simple example but even with this example I am getting an error. My Code:

#include "C:\\Emscripten\\emscripten\\1.30.0\\system\\include\\emscripten\\bind.h"

using namespace emscripten;

class AddTest
{
public:
    static unsigned int addTest(unsigned int stepCount);

};

EMSCRIPTEN_BINDINGS(AddTest)
{
    class_<AddTest>("AddTest")
        .constructor<>()
        .class_function("addTest", &AddTest::addTest)
        ;
}

With this code, it gets me an error:

"Error: no instance of constructor "class_BaseSpecifier::class_[with ClassType=AddTest, >BaseSpecifier=internal::NoBaseClass]" matches the argument list

An example for using Embind is given here: http://ift.tt/1JYHsrD

I am just not able to spot the difference between the example and my code.

Can somebody help me?