jasper reports gets NoClassDefFoundError

I get the following error.  I know it is likely a missing jar file, but I have all of the listed prerequisites.  Here are the details:

java.lang.NoClassDefFoundError: org/apache/commons/digester/Rule
      at net.sf.jasperreports.components.ComponentsExtensionsRegistryFactory.<clinit>(ComponentsExtensionsRegistryFactory.java:110)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Class.java:247)
      at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForRealName(JRClassLoader.java:157)
      at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForName(JRClassLoader.java:115)
      at net.sf.jasperreports.engine.util.ClassUtils.instantiateClass(ClassUtils.java:53)
      at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.instantiateRegistry(DefaultExtensionsRegistry.java:237)
      at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.loadRegistries(DefaultExtensionsRegistry.java:214)
      at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.loadRegistries(DefaultExtensionsRegistry.java:162)
      at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.getRegistries(DefaultExtensionsRegistry.java:133)
      at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.getExtensions(DefaultExtensionsRegistry.java:105)
      at net.sf.jasperreports.engine.util.JRStyledTextParser.<clinit>(JRStyledTextParser.java:83)
      at net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:123)
      at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:88)
      at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:103)
      at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:61)
      at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:179)
      at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:108)
      at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:653)
      at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:569)
      at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:915)
      at ca.specialtysoftware.jpar.reports.ReportFileIO.fillReport(ReportFileIO.java:147)
      at ca.specialtysoftware.jpar.reports.ReportFileIO.saveJasperPrint(ReportFileIO.java:95)
      at ca.specialtysoftware.jpar.reports.ReportFileIO.saveJasperPrint(ReportFileIO.java:79)
      at ca.specialtysoftware.jpar.business.tasks.BuildClaimsDetailTask.doInBackground(BuildClaimsDetailTask.java:131)
      at javax.swing.SwingWorker$1.call(SwingWorker.java:278)
      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
      at java.util.concurrent.FutureTask.run(FutureTask.java:138)
      at javax.swing.SwingWorker.run(SwingWorker.java:317)
      at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
      at java.lang.Thread.run(Thread.java:619)


Here are the class libraries that I have included in my project:
JAXP_150.jar
commons-beanutils-1.9.1.jar
commons-collections-2.1.1.jar
commons-logging-1.1.1.jar
commons-javaflow-1209105.jar
commons-digester3-3.2.jar
commons-codec-1.5.jar
itext-2.1.3.jar
poi-3.2-FINAL.jar
jfreechart-1.0.7.jar
jxl-2.6.12.jar
jasperreports-5.5.1.jar
jasperreports-applet-5.5.1.jar
jasperreports-font-5.5.1.jar
jasperreports-javaflow-5.5.1.jar
servlet-api-2.4.jar

These other jar files that should be unrelated are there as well
toplink-essentials-agent.jar
RelativeLayout.jar
xercesImpl-2.9.1.jar
MySQL-connector-java-5.1.6-bin.jar
ostermillerutils_1_07_00.jar


This is jasperreports 5.5.1 obviously.  If anyone has it working for a stand-alone java program and can compare my situation with their working one, I would appreciate it.
LVL 1
Doug PoulinCTOAsked:
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Doug PoulinCTOAuthor Commented:
Solved it.  When you download apache commons digester library make sure that you do not get the (most recent) digester3 version, get the digester-2.1 version.  They are not the same.
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Doug PoulinCTOAuthor Commented:
I hate giving myself the points, but I did solve it, and I think this should be posted since other developers seem to have similar problems with jasperreports.
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