I'm trying to read from an excel worksheet and i'm receveing this error code :
PHP Code:
Old format or invalid type library. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD)) 

Code:
Imports Excel = Microsoft.Office.Interop.Excel
Public Class test
    Dim xlApp As New Excel.Application
    Dim xlWorkBook As Excel.Workbook
    Dim xlWorkSheet As Excel.Worksheet
    Dim ala(0 To 100) As String

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Me.Close()
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        xlWorkBook = xlApp.Workbooks.Add
        xlApp.Visible = True
        xlWorkSheet = xlWorkBook.Sheets("Sheet1")
        With xlWorkSheet
            ala(1) = .Range("A1").Value
            ala(2) = .Range("A2").Value
            ala(3) = .Range("A3").Value
            ala(4) = .Range("A4").Value
            ala(5) = .Range("A5").Value
        End With
        For i = 1 To 5
            ListBox1.Items.Add(ala(i))
        Next
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        xlWorkBook = xlApp.Workbooks.Open("C:\Documents and Settings\cretzu1\Desktop\New Microsoft Office Excel Worksheet.xlsx")
        xlApp.Visible = True
    End Sub
End Class
How can i resolve it?