Anyone know why icant move my recordset to the last register??' it show me this error on detail2.MoveLast

Error Type:
Microsoft OLE DB Provider for ODBC Drivers (0x80040E24)
Rowset does not support fetching backward

Im using this code

detail2_total2=0
If (detail2.CursorType > 0) Then
detail2.MoveLast
detail2_total2=detail2.Fields.Item("Folio"
Else
detail2.Requery
End If