Crystal reports

Question

i have created web form in asp.net and a crystal reports and i have set the database. when i call the report from Form it give me error of CrystalKeyCodeLib.dll not found. when i add the reference. it give me another error CrystalDecisions.CrystalReports.Engine.InternalException: Cannot find KeycodeV2.dll, or invalid keycode. is there any other way around beside above steps .