Export PDF from Crystal Report .NET using ASP.NET

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I'm able to view the report, but when I click the button on the webpage that shows the report to export into a different format it gives me an error on Export. Any help would be great

I keep getting the following error

Logon failed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: CrystalDecisions.CrystalReports.Engine.LogOnException: Logon failed

Source Error:

Line 95: myExportOptions.ExportDestinationType = ExportDestinationType.DiskFile
Line 96: myExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat
Line 97:
Line 98: report.Export()
Line 99:

HERE IS MY CODE

private void Page_Load(object sender, System.EventArgs e

report = new MainProject.Reporting.crcustomerreport()

// Create connectio
SqlConnection objConn = new SqlConnection(ConfigurationSettings.AppSettings"ConnectionString")
SqlCommand myCommand = new SqlCommand("getCustomersNoOwnerIDReturned", objConn)
myCommand.CommandType = CommandType.StoredProcedure

SqlParameter parameterOwnerID2 = new SqlParameter("@OwnerID", SqlDbType.VarChar, 50);
parameterOwnerID2.Value = (string)Session"OwnersUserName"
myCommand.Parameters.Add(parameterOwnerID2)

SqlDataAdapter myAdapter = new SqlDataAdapter(myCommand)

MainProject.Reporting.dscustomerreport ds = new MainProject.Reporting.dscustomerreport()
myAdapter.Fill(ds, "Customers")

report.SetDataSource(ds)

CrystalReportViewer1.DisplayGroupTree = false
CrystalReportViewer1.DisplayToolbar = false

CrystalReportViewer1.ReportSource= report;


private void btnExport_Click(object sender, System.EventArgs e

ExportOptions myExportOptions
DiskFileDestinationOptions myDiskFileDestinationOptions

string myExportFile
report = new MainProject.Reporting.crcustomerreport()
myExportFile = @"C:\temp\" + Session.SessionID.ToString() + ".pdf"

myDiskFileDestinationOptions = new DiskFileDestinationOptions()

myDiskFileDestinationOptions.DiskFileName = myExportFile

myExportOptions = report.ExportOptions

myExportOptions.DestinationOptions = myDiskFileDestinationOptions
myExportOptions.ExportDestinationType = ExportDestinationType.DiskFile
myExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat

report.Export()

Response.ClearContent()
Response.ClearHeaders()
Response.ContentType = "application/pdf"
Response.WriteFile(myExportFile)
Response.Flush()
Response.Close()

System.IO.File.Delete(myExportFile)



Can anyone tell me what I need to do to fix this problem. I'll need details, I'm new to Crystal Reports .NET

Thanks
Harold