Crystal reports Record Selection Formula on VS2012/2013 is not working, its shows all records

  Hi Experts,

I have just upgrade my VS 2008 application to VS 2012 and facing a critical situation with Crystal reports.
My reports worked accurately on the previous versions and now when I build my solution on VS 2012 , reports that I have made using report wizard on previous VS2010 are not working at all.

In runtime it just select all the records ignoring the Record selection conditions.

I have installed   Support Pack 15 (v.13.0.15.1840

downloaded from SAP suggested site but the issue still remains. My formula to view report in run time is as under :

Dim Report As New LPOReport

        Me.WindowState = 2

        Report.Refresh()

        Report.RecordSelectionFormula = ("{PRINFO.PRNo}='" & Trim(txtPA.Text) & "'")

        RpT1.ReportSource = Report

        RpT1.Show()

        RpT1.Zoom(95)

        'RpT1.Dispose()

        Report = Nothing

Please help me to sort this out .

Thank you very much.