iam having problem exporting the crystal report from my .aspx page.
first iam displaying the crystal report in .aspx page.from tha t page iam exporting it to a pdf file.i have provided a button to export the report to a pdf file.
the problem is coming in exporting the report to pdf file
iam getting logon error i.e
CrystalDecisions.CrystalReports.Engine.LogOnExcept ion: Logon failed.


the code for export button is

Dim myReport As New Employee()



        Dim strExportFile As String
        Dim objExOpt As ExportOptions
        Dim objDiskOpt As New DiskFileDestinationOptions()

        strExportFile = "c:\jobs4hunt.pdf"

        objDiskOpt.DiskFileName = Server.MapPath(".") & "/export/" & strExportFile
        objExOpt = myReport.ExportOptions
        objExOpt.ExportDestinationType = ExportDestinationType.DiskFile
        objExOpt.ExportFormatType = ExportFormatType.PortableDocFormat
        objExOpt.DestinationOptions = objDiskOpt
        myReport.Export()
        myReport.Close()


any idea what is wrong.help me out.