Problemas com relatorios

Boa noite pessoal!
Estou com uns problemas na parte de relatórios para web. Acho que deve esta faltando algum .jar, segue o erro:
25/10/2010 21:09:13 org.apache.catalina.core.StandardWrapperValve invokeSEVERE: Servlet.service() for servlet ExecutaRelatorio threw exceptionjava.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser        at net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:182)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:77)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:87)        at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:57)        at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:142)        at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:52)        at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417)        at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:378)        at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:163)        at br.com.integrator.web.ExecutaRelatorio.processRequest(ExecutaRelatorio.java:83)        at br.com.integrator.web.ExecutaRelatorio.doGet(ExecutaRelatorio.java:117)        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)        at java.lang.Thread.run(Thread.java:619)

Obrigado pela atenção!