[jasperreports-questions] Error regard generate reports using jasperReports in dwr

I am genreting reports usung japerReportsin dwr.I am getting these errors Errors were encountered when compiling report expressions class file: D:\Program Files\Apache Software Foundation\Tomcat 5.0\item_1195298575593_251940.java:4: package net.sf.jasperreports.engine does not exist import net.sf.j

[jasperreports-questions] Error regard generate reports using jasperReports in dwr

i am generating reports with jasperreports in dwr.it gives error like this Errors were encountered when compiling report expressions class file: D:\Program Files\Apache Software Foundation\Tomcat 5.0\item_1195287830437_658743.java:4: package net.sf.jasperreports.engine does not exist import net.sf