Run time error 13

[nil.kul007]

but showing run-time error 13


'The process for Removing duplicates rows in excel files using vb 6.0

            Mrg_Row = wsN.UsedRange.Rows.Count
            Mrg_Col = wsN.UsedRange.Columns.Count
            Dim k As Long
            For i = 2 To Mrg_Row
                Form2.Caption = "Removing duplicates pleas wiat..." & i
                    If wsN.Range(wsN.Cells(1, 1), wsN.Cells(1, Mrg_Col)).Value = wsN.Range(wsN.Cells(i, 1), wsN.Cells(i, Mrg_Col)).Value Then
                        wsN.Range(wsN.Cells(i, 1), wsN.Cells(i, Mrg_Col)).Delete
                    End If
            Next

What is error in this plz help me