How to create and save Excel file using windows service created in VB.Net

Hi,
Am new to VB.Net. I have created a windows service. Where my simple goal is to create an Excel file and save it to my local drive. I have used the following code.

 Dim oExcel As Excel.Application
            Dim oBook As Excel.Workbook
            Dim oSheet As Excel.Worksheet
            oExcel = CreateObject("Excel.Application")
            oBook = oExcel.Workbooks.Add

'Start a new workbook in Excel.

            'Add data to cells of the first worksheet in the new workbook.
            oSheet = oBook.Worksheets(1)
            oSheet.Range("A1").Value = "Last Name"
            oSheet.Range("B1").Value = "First Name"
            oSheet.Range("A1:B1").Font.Bold = True
            oSheet.Range("A2").Value = "Doe"
            oSheet.Range("B2").Value = "John"

            oBook.SaveAs(strFileName)
            oSheet = Nothing
            oBook = Nothing
            oExcel.Quit()
            oExcel = Nothing
            GC.Collect()

Now this CreateObject throwing exception "Cannot create ActiveX component." I have added reference of Microsoft Excel & Office in my project.

Any idea what am doing wrong or what should be done? It is possible to create and save excel file from windows service right?

P.S - Am on windows 7 64 bit machine and using vs2010, office 2010.

Tags: Visual Basic, Windows, Microsoft Excel, Service