VB.NET Crystal Reports

I am using visual studio .net 2002. I have created windows application using vb.net.Created one form and I am opening one crystal report using that form.I have used CrystalReportViewer. When I was design application, it was asking for Crystal report Registration. I was allways cancelling this and was able to work on application/crystal report. Note : I don't have internet connection. One day I have entered following ,in the registration window. Registration number : 8013180283 Key code : A5S50-81C0000-5X00027. when I wanted to run that an error occured. An unhandled exception of type 'CrystalDecisions.CrystalReports.Engine.OutOfLicenceException' occured in CrystalDecisions.CrystalReports.engine.dll version : 9.1.3300.0 Next day when I opened the application,it doesn't opened and there is continous error "invalid KeyCode" pls help me out ,what may be the reason.