problem static linking MFC C++

[Tim Mulholland]

I am trying to "wrap" an MFC C++ class in Managed C++.
I am getting a System.NullReferenceException everytime i try to execute a
function.
I don't ahve a clue if i'm doing it right, but i'm trying very hard :)

Here is my code for the MFC/C++ Class:

class ActLib
{
public:
ActLib(void);
~ActLib(void);
CString Simple(CString s);
};

ActLib::ActLib(void)
{
}
ActLib::~ActLib(void)
{
}
CString ActLib::Simple(CString s)
{
return s + "85";
}

And here is how i'm trying to wrap it:

namespace StaticLinkTest
{
public __gc class HelperWrap
{
// TODO: Add your methods for this class here.
public:
HelperWrap() : m_pActLib(new ActLib()) {}
String* Simple(String *s);
private:
ActLib *m_pActLib;
};
}

String* StaticLinkTest::HelperWrap::Simple(String *s)
{
return m_pActLib->Simple(s);
}

When i hit F10 on the single line in the HelperWrap::Simple() function, i
get the System.NullReferenceException error...
Any ideas what this could be?
I'd appreciate any help.

Tim