Problem with VBA in Excel - following code giving me an error

[p45cal]

Either:

CellValue = ThisWorkbook.Sheets("FORM").Range("D14").Value & "-" & ThisWorkbook.Sheets("FORM").Range("E8").Value

or

With ThisWorkbook.Sheets("FORM")
  CellValue = .Range("D14").Value & "-" & .Range("E8").Value
End With