ایراد در import اکسل داخل گرید

چشم. ممنون از راهنماییتون مدیرجان

 Dim conn As OleDbConnection
Dim dta As OleDbDataAdapter
Dim dts As DataSet
Dim excel As String
Dim OpenFileDialog As New OpenFileDialog
OpenFileDialog.InitialDirectory = My.Computer.FileSystem.SpecialDirectories.MyDocume nts
OpenFileDialog.Filter = "All Files (*.*)|*.*|Excel files (*.xlsx)|*.xlsx|CSV Files (*.csv)|*.csv|XLS Files (*.xls)|*xls"
If (OpenFileDialog.ShowDialog(Me) = System.Windows.Forms.DialogResult.OK) Then
Dim fi As New FileInfo(OpenFileDialog.FileName)
Dim FileName As String = OpenFileDialog.FileName
excel = fi.FullName
conn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0 ;Data Source=" + excel + ";Extended Properties=Excel 12.0;")
dta = New OleDbDataAdapter("Select * From [Sheet1$]", conn)
dts = New DataSet
dta.Fill(dts, "[Sheet1$]")
Grid.DataSource = dts
Grid.DataMember = "[Sheet1$]"
conn.Close()
Grid.ShowColumnHeaders = True
End If

این کد import excel to grid
و این هم فایل اکسل برنامه نویس...