Tomcat 4.0.3 build problem

hi i am not able to compile source for tomcat 4.0.3
The exact problem i have written down. Can you help me in this case.
I am sure that my jar file containing org/w3c/dom/traversal/NodeIterator is
 in a classpath.
Pls help me in this case

thanks ,
vijay

BUILD FAILED

java.lang.NoClassDefFoundError: org/w3c/dom/traversal/NodeIterator
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:120)
        at org.apache.xml.utils.ObjectPool.<init>(ObjectPool.java:100)
        at
org.apache.xalan.transformer.TransformerImpl.<init>(TransformerImpl.java:23
6)
        at
org.apache.xalan.templates.StylesheetRoot.newTransformer(StylesheetRoot.jav
a:175)
        at
org.apache.tools.ant.taskdefs.optional.TraXLiaison.setStylesheet(TraXLiaiso
n.java:112)
        at
org.apache.tools.ant.taskdefs.XSLTProcess.configureLiaison(XSLTProcess.java
:459)
        at
org.apache.tools.ant.taskdefs.XSLTProcess.process(XSLTProcess.java:340)
        at
org.apache.tools.ant.taskdefs.XSLTProcess.execute(XSLTProcess.java:179)
        at org.apache.tools.ant.Task.perform(Task.java:217)
        at org.apache.tools.ant.Target.execute(Target.java:164)
        at org.apache.tools.ant.Target.performTasks(Target.java:182)
        at org.apache.tools.ant.Project.executeTarget(Project.java:601)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:256)
        at org.apache.tools.ant.Task.perform(Task.java:217)
        at org.apache.tools.ant.Target.execute(Target.java:164)
        at org.apache.tools.ant.Target.performTasks(Target.java:182)
        at org.apache.tools.ant.Project.executeTarget(Project.java:601)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:256)
        at org.apache.tools.ant.Task.perform(Task.java:217)
        at org.apache.tools.ant.Target.execute(Target.java:164)
        at org.apache.tools.ant.Target.performTasks(Target.java:182)
        at org.apache.tools.ant.Project.executeTarget(Project.java:601)
        at org.apache.tools.ant.Project.executeTargets(Project.java:560)
        at org.apache.tools.ant.Main.runBuild(Main.java:454)
        at org.apache.tools.ant.Main.start(Main.java:153)
        at org.apache.tools.ant.Main.main(Main.java:176)

Total time: 13 seconds
org/w3c/dom/traversal/NodeIterator