Crystal Report Export - Database Logon Failed

Question

Below is my code in VB.Net.  I am using PUSH method to populate my data.  I use Crystal Report and VS 2003.   I am trying to export a crystal report to a PDF. I am getting a database log on error. Please help!!! 

----------------------------------------------
Try
Dim oStream As New MemoryStream
Me.crpt_numIssues.ExportToStream(ExportFormatType.PortableDocFormat)
Response.Clear()
Response.Buffer = True
Response.ContentType = "application/pdf"
Response.BinaryWrite(oStream.ToArray())
Response.End()


Catch ex As Exception
Dim mgsText As String
mgsText = "ERROR: An error occured. <br>" + ex.ToString
Me.ShowErrorPanel(mgsText)
End Try

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The error is:

CrystalDecisions.CrystalReports.Engine.LogOnException: Database logon failed. ---> System.Runtime.InteropServices.COMException (0x8004100F): Database logon failed. at CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass.Export(ExportOptions pExportOptions, RequestContext pRequestContext) at CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext)