Passing an instance of System::Windows::Forms::Form to another class

[Pantokrator]

Hi!
Could you please tell me what am I doing wrong here....

I've got a simple form called Form1 and all I want to do is to pass
the pointer to my other class called CCueMakerEngine. Here's what I've
got:

In Form1.h:
----------------------------
#pragma once

#include ".\cuemakerengine.h"

namespace CueMaker
{
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

public __gc class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
CCueMakerEngine* pCCMakeEng = new CCueMakerEngine(this);

InitializeComponent();
}
....
};
}

In "CueMakerEngine.cpp":
------------------------------------------------------------------------
#include "StdAfx.h"
#include ".\cuemakerengine.h"

#using <mscorlib.dll>

CCueMakerEngine::CCueMakerEngine(CueMaker::Form1 __gc *const)
{

}

CCueMakerEngine::~CCueMakerEngine(void)
{
}
In "CueMakerEngine.h":
------------------------------------------------------------------------

#pragma once
#include "Form1.h"

class Form1;

class CCueMakerEngine
{
public:
CCueMakerEngine(Form1 __gc *const);
virtual ~CCueMakerEngine(void);
private:

};
**
I get the error:
error C2664: 'CCueMakerEngine::CCueMakerEngine(Form1 __gc *const )' :
cannot convert parameter 1 from 'CueMaker::Form1 __gc *const ' to
'Form1 __gc *const '

If I then replace:
CCueMakerEngine(Form1 __gc *const); (in CueMakerEngine)
to:
CCueMakerEngine::CCueMakerEngine(CueMaker::Form1 __gc *const )

the compiler then does not recognise the CueMaker namespace...
error C2653: 'CueMaker' : is not a class or namespace name
Form1.cpp(13) : error C2872: 'Form1' : ambiguous symbol

Could you please give me your help
Thanks
Telis