How do I deal with the situation that My program can cause an assertion when addstring to ListBox

debug which tells assertion failed when run.
  
Here is the brief structure:
   
   class A
  {
      CListBox m_listvalue;

     .......
  }

  class T
  {
  .....
    
   Myfunc()
   {
      A a;
     a.m_listvalue.addString("Calculative table : ");  
               //Explain: the program break out when come here
     ......
   ｝
  ｝

Debug Assertion Failed!
...c:\T.exe
File:f:\dd\ve\vctools\vc7libs\ship\atlmfc\include\afxwin2.inl
Line: 810

For information on how your program can cause an assertion failure, see the
Visual C++ documentation on assers.

(press Retry to debug the application)

//OutputDialog.h
class OutputDialog : public CDialog
{
// Construction
public:
	OutputDialog(CWnd* pParent = NULL);   // standard constructor
//	void UpdateList();
// Dialog Data
	//{{AFX_DATA(OutputDialog)
	enum { IDD = IDD_OUTPUTDIALOG };
	CListBox m_ListValue;
	//}}AFX_DATA

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(OutputDialog)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL
// Implementation
protected:
	// Generated message map functions
	//{{AFX_MSG(OutputDialog)
         virtual BOOL OnInitDialog();
	virtual void OnOK();
	virtual void OnCancel();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
	
//OutputDialog
};

//OutputDialog.cpp

OutputDialog::OutputDialog(CWnd* pParent /*=NULL*/)
	: CDialog(OutputDialog::IDD, pParent)
{
	//{{AFX_DATA_INIT(OutputDialog)
	//}}AFX_DATA_INI
}

void OutputDialog::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(OutputDialog)
	DDX_Control(pDX, IDC_LIST1, m_ListValue);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(OutputDialog, CDialog)
	//{{AFX_MSG_MAP(OutputDialog)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// OutputDialog message handlers

BOOL OutputDialog::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	// TODO: Add extra initialization here

   // m_ListValue.CreateObject();

	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void OutputDialog::OnOK() 
{
	
	// TODO: Add extra validation here
	 this->CloseWindow();
	
	CDialog::OnOK();
}

void OutputDialog::OnCancel() 
{
	// TODO: Add extra cleanup here
	if(this->MessageBox( "Are you sre",Message", MB_ICONQUESTION|MB_YESNO))
	{
           this->DestroyWindow();
	}

	CDialog::OnCancel();
}

void ShowTabelContend()
 {
    OutputDialog outputDialog;

     //OutputDialog outputDialog = new OutputDialog();
     //   if(this->matrixtable && this->size != 0)        
    //   {       //Explain:  matrixtable and size is the element arialble in My data pass class
       //if((outputDialog != NULL))
    //  {

        //  char *Title = "Calculative table" :;
        //  outputDialog.m_ListValue.InsertString(1,Title);

            outputDialog.m_ListValue.AddString("Calculative table :");

        /*  for (int i = 1; i < 2 * this->size + 1; ++ i)
            {
               outputDialog.m_ListValue.InsertString(i * 5, 
                            (this->matrixtable + (i - 1) * 2 *this->size));
               outputDialog.m_ListValue.AddString(
                             (this->matrixtable + (i - 1) * 2 *this->size));
            }
        }*/
        outputDialog.UpdateData(false);
        outputDialog.DoModal();
        
    }

    return ;
}