I tried to modify jasper report to sentenal template Report when i try to view report i get this problem java.lang.ClassNotFoundException : will not load classes from default package (TemplateReportScriptlet) And Msg Compiling to file... C:\Documents and Settings\msayed\Desktop\current\content\dev\reports\Log Manager\etnen\6.1\TemplateReport.jasper net.sf.jasperreports.engine.design.JRValidationException: Report design not valid : 1. java.lang.ClassNotFoundException: Will not load classes from default package (TemplateReportScriptlet) at net.sf.jasperreports.engine.design.JRAbstractCompiler.verifyDesign(JRAbstractCompiler.java:262) at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:144) at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:525) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986) Compilation running time: 328 How to solve it?