Dialog Box not reading data

[alle]

I am running a program created using Visual C++ 2010 Express.
I have several dialog boxes to read input data.
One works perfectly, but a second one simply does not read any data at all, and I cannot figure out why.
The two dialogs are defined as

LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDD_DIALOG5 DIALOG 0, 0, 275, 95
STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION | WS_VISIBLE | WS_POPUP | WS_SYSMENU
CAPTION "Enter Start and End Date"
FONT 8, "Ms Shell Dlg"
{
    DEFPUSHBUTTON   "OK", IDOK, 218, 9, 50, 14
    PUSHBUTTON      "Cancel", IDCANCEL, 218, 30, 50, 14
    EDITTEXT        IDC_EDIT1, 11, 17, 36, 18, ES_AUTOHSCROLL
    EDITTEXT        IDC_EDIT2, 53, 17, 88, 18, ES_AUTOHSCROLL
    EDITTEXT        IDC_EDIT3, 147, 17, 57, 18, ES_AUTOHSCROLL
    EDITTEXT        IDC_EDIT4, 12, 55, 36, 18, ES_AUTOHSCROLL
    EDITTEXT        IDC_EDIT5, 54, 55, 88, 18, ES_AUTOHSCROLL
    EDITTEXT        IDC_EDIT6, 148, 55, 57, 18, ES_AUTOHSCROLL
}
IDD_DIALOG6 DIALOG 0, 0, 227, 105
STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION | WS_VISIBLE | WS_POPUP | WS_SYSMENU
CAPTION "Date for Chart"
FONT 8, "Ms Shell Dlg"
{
    DEFPUSHBUTTON   "OK", IDOK, 166, 5, 50, 14
    PUSHBUTTON      "Cancel", IDCANCEL, 166, 26, 50, 14
    EDITTEXT        IDC_EDIT7, 14, 20, 71, 16, ES_AUTOHSCROLL
    EDITTEXT        IDC_EDIT8, 95, 20, 44, 16, ES_AUTOHSCROLL
    AUTORADIOBUTTON "Monthly", ID_CHECKBOXM, 20, 50, 41, 8,  WS_GROUP | WS_CHILD | WS_VISIBLE | WS_TABSTOP
    AUTORADIOBUTTON "Quarterly", ID_CHECKBOXQ, 20, 65, 44, 8,  WS_CHILD | WS_VISIBLE 
    AUTORADIOBUTTON "Six Months", ID_CHECKBOX6, 20, 80, 51, 8, WS_CHILD | WS_VISIBLE 
}

The first dialog works perfectly and I can read the six data values without any problem.
Analysis of the second box shows that the two value are both NULL strings and 'value' is always set to SIXMONTHS.
The code used to read the dialog is

GetDlgItemTextA(hDlg, IDC_EDIT7, mx, SMALL);
	GetDlgItemTextA(hDlg, IDC_EDIT8, yx, SMALL);
	FindMonth(mx, &mxx); // Convert character month to numeric
	sscanf_s(yx, "%d", &yxx);
        dd2 = DateOfEnd(mxx, yxx); // Determine end date of month
	Number2 = DayNumber(yxx, mxx, dd2);
	MyDates->day2   = dd2;
	MyDates->month2 = mxx;
	MyDates->year2  = yxx;
	MyDates->DayNumber2 = Number2;
	fprintf(fp1, "ReadFinalMonth: TO - %d %d %d %ld\n", dd2, mxx, yxx, Number2);
	fflush(fp1);

//    if (mx[0])
//    {
        /* Check if Quarterly, Monthly or 6 months*/
        if (IsDlgButtonChecked(hDlg, ID_CHECKBOXM) == BST_CHECKED)
        {
            LastOption = value;
            value = MONTHLY;
            CheckOne = ID_CHECKBOXM;
        }
        else if (IsDlgButtonChecked(hDlg, ID_CHECKBOXQ) == BST_CHECKED)
        {
            LastOption = value;
            value = QUARTERLY;
            CheckOne = ID_CHECKBOXQ;
        }
        else
        {
            LastOption = value;
            value = SIXMONTHS;
            CheckOne = ID_CHECKBOX6;
        }

Can someone suggest why this is not working?