What could be wrong?

BOOL Personal::OnInitDialog()
{
	CPropertyPage::OnInitDialog();

	CComboBox *pCombo2 = (CComboBox *)GetDlgItem(IDC_COMBO4);
	CComboBox *pCombo3 = (CComboBox *)GetDlgItem(IDC_COMBO5);

	int i = 0;
	while(*szSex[i])
	{
		int iPosition = pCombo2->AddString(szSex[i]);//throws an exception at this point.
		pCombo2->SetItemData(iPosition,i);
		i++;
	}
	pCombo2->SetCurSel(0);

	i = 0;
	while(*szStudentKind[i])
	{
		int iPosition = pCombo3->AddString(szStudentKind[i]);
		pCombo2->SetItemData(iPosition,i);
		i++;
	}
	pCombo3->SetCurSel(0);
	
	if(!LoadClassStudents(pStudEdit->m_iClassID))
	{
		return 0;
	}

	INT_PTR iStudentID = pStudEdit->m_Personal.GetStudentID();
	if(!Load(iStudentID))
	{
		return 0;
	}


	CString stTitle;
	stTitle.LoadString(m_hInstance,IDS_PERSONAL,(WORD)LANGUAGE);
	SetWindowText(stTitle);

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