主题：为何下列只能在Excel2003下应用，在Excel2007以上版本出错

为何下列只能在Excel2003下应用，在Excel2007以上版本出错
Dim prs As Integer = 25 '每页细节区行数
Dim fl As Integer = 6 '每页栏数
Dim ls As Integer = 2 '每栏列数
Dim bts As Integer = 3 '表头数
Dim bws As Integer = 8 '表尾数

Dim csh As Integer  '每页初始行
Dim s,g,lz,zh As Integer
'zh=prs  '每页总行数
zh=prs+bts+bws  '每页总行数

Dim App As New MSExcel.Application
Dim Wb As MSExcel.WorkBook = App.WorkBooks.Open(lj)
Dim Ws As MSExcel.WorkSheet = Wb.WorkSheets(1)
App.ScreenUpdating = False
For p As Integer = 1 To math.Ceiling(tb.Rows.Count /( fl*prs)) - 1  'p分页
    Ws.Rows("1:" & zh).Copy(Ws.Range("a" & p*zh+1))
Next

Ws.Cells.PageBreak = MSExcel.XlPageBreak.xlPageBreakNone'清除所有分页符
Ws.Columns(fl*ls+1).PageBreak = MSExcel.XlPageBreak.xlPageBreakManual '纵向分页

For p As Integer = 0 To math.Ceiling(tb.Rows.Count /( fl*prs)) - 1  'p分页
   csh=bts+p*zh
  'csh=p*zh
    s = 0
    g = 1
   
    For r As Integer =  P*FL*prs To math.min(tb.Rows.Count - 1,( p + 1) *fl* prs - 1)  '在每页数据内循环
       
        lz = (Int(s/prs)) * ls+1  '指定数据列数
        If s/prs = Int((s+1)/prs)  Then g = 1    
        ws.cells(csh+g,lz) = r+1
       
               For m As Integer = 0 To nms.Length-1
                    ws.cells(csh+g,lz+m+1) = tb.rows(r)(nms(m))
               Next
        g = g + 1 '每页每列各数据累计次数
        s = s + 1 '每页各数据累计次数
       
    Next
    'msgbox((p+1)*zh+1)
    Ws.Rows((p+1)*zh+1).PageBreak = MSExcel.XlPageBreak.xlPageBreakManual
Next