erreur 424

Bonjour, l'exécution de cette macro me donne un erreur424 sur le ligne "With ClFileSearch.ClasseFileSearch" (je travaille sur excel 2013) :

Sub chercheFichiersFermes()
	Dim X As Integer, nbFichiers As Integer, Y As Integer
	Dim Tableau() As String
	Dim Direction As String
	Application.ScreenUpdating = False
	Direction = dir("C:\Users\Dream\Desktop\Nouveau dossier\*.xls") 'adapter chemin repertoire et ajouter "\*.xls" pour dire tout les fichiers("C:\Users\Dream\Desktop\Nouveau dossier")
	Worksheets("Sheet1").Columns("D").NumberFormat = ""
	Do While Len(Direction) > 0
		nbFichiers = nbFichiers + 1
		ReDim Preserve Tableau(1 To nbFichiers)
		Tableau(nbFichiers) = Direction
		Direction = dir()
	Loop
	If nbFichiers > 0 Then
		For X = 1 To (nbFichiers - 1)
			If Tableau(X) <> ThisWorkbook.Name Then
				Z = Z + 1
				With ActiveSheet.Cells(Z, 1) 
					.Formula = "='C:\Users\Dream\Desktop\Nouveau dossier\[" & Tableau(X) & "]Débit" & "'!" & "K7" 
					.Value = .Value
				End With
				With ActiveSheet.Cells(Z, 2)
					.Formula = "='C:\Users\Dream\Desktop\Nouveau dossier\[" & Tableau(X) & "]Débit" & "'!" & "O2" 
					.Value = .Value
				End With
				With ActiveSheet.Cells(Z, 3) 
					.Formula = "='C:\Users\Dream\Desktop\Nouveau dossier\[" & Tableau(X) & "]Débit" & "'!" & "D14" 
					.Value = .Value
				End With
				With ActiveSheet.Cells(Z, 4) 
					.Formula = "='C:\Users\Dream\Desktop\Nouveau dossier\[" & Tableau(X) & "]Moulage" & "'!" & "K16" 
					.Value = .Value
				End With
			End If
		Next X
	End If
	With ClFileSearch.ClasseFileSearch
		.LookIn = "C:\Users\Dream\Desktop\Nouveau dossier\*.xls" 'adapter chemin repertoire et ajouter "\*.xls" pour dire tout les fichiers
		.SearchSubFolders = False
		.Filename = "*.xls"
		.FileType = msoFileTypeExcelWorkbooks
		If .Execute > 0 Then
			For i = 1 To .FoundFiles.Count
				Range("M" & i + 1).Value = .FoundFiles(i)
				Next i
			End If
	End With
	Application.ScrecenUpdating = True
End Sub