i have write the following codes to run the crystal report...

cr1.Connect = "DSN=abcserver;uid=abc;pwd=abc"
cr1.ReportFileName = App.Path & "\reports\rpt_pol_to.rpt"
cr1.SelectionFormula = "{DTL_RECEIVED.DR_NO} = " & txt_no
cr1.Action = 0

i m getting the following error


run time error 20515
error in file (file name)
error in formula <record selection>
the remaing text does not appear..

plz help me