prova con queste modifiche:
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
On Error Resume Next
Set zona1 = Range(Cells(1, 1), Cells(1000, 1))
If Not Intersect(Target, zona1) Is Nothing Then
Dim riga, colonna
riga = Target.Row
colonna = 26
Target.Copy
For N = 2 To 5
Sheets("foglio" & N).Activate
With ActiveSheet
.Cells(riga, colonna).Select
ActiveSheet.Paste
End With
Next
Application.CutCopyMode = False
End If
Resume
Range("A1").Select
End Sub
saluti
Andrea