LabView: How to pass in parameters to .NET method using "Invoke Method" vi?

Question

I have a .NET class library that I wrote in C++. "public ref class MyClass" defines a method "MyMethod" that takes two System::Int32 parameters.

Here is MyClass first then my question:

namespace MyNetAssembly {    
    public ref class MyClassThatDoesStuff
    {
    public:
        MyClassThatDoesStuff();

        void MyMethod(System::Int32^ number1, System::Int32^ number2);
        property System::Int32 MyProperty{
            int get (){
                return *_result;
            }

            void set(System::Int32 value){
            }
        }
    private:
        int^ _result;
    };
}

Here is the cpp code:

MyNetAssembly::MyClassThatDoesStuff::MyClassThatDoesStuff()
{
    *_result = 0;
}

void MyNetAssembly::MyClassThatDoesStuff::MyMethod(System::Int32^ number1, System::Int32^ number2)
{
    *_result =(*number1 + *number2) * 100;
}

When I load this assembly from LabView 8.5 using "Constructor Node" vi. Then, I try to invoke MyMethod() using an "Invoke Method" vi, I get the parameters to the method to be of "ValuteType" and not "Int32" as I expect to use directly with LabView constants and controls. Rather, when I create a constant by right clicking on the connector for the parameter, I get ".NET Object"!

Please, How can I get LabView to recognize parameter types?

Note: I tried to change parameters from System::Int32^ number1 to System::Int32 number1. That did not help either.