Need Help!!! Xerces.jar issue

Hi,
I am using IBM AIX 6.1 . I have deployed my web application on tomcat on AIX
. I am facing one problem of xerces.jar .
I am getting following exception while navigation my jsp page in which I
used .
Can any one please help me to get rid of the following error? I would be
very thankful to him.
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*May 21, 2008 10:08:58 PM : CRITICAL ERROR :
error.jsp@7EFFE708C4EA42F8FC23AE6EC02B680D : Exception:
java.lang.VerifyError: receiver is incompatible with declaring class (class:
org/apache/xalan/xpath/xdom/XercesLiaison method:
parse(Lorg/xml/sax/InputSource;)V) at pc: 135
java.lang.VerifyError: receiver is incompatible with declaring class (class:
org/apache/xalan/xpath/xdom/XercesLiaison method:
parse(Lorg/xml/sax/InputSource;)V) at pc: 135
    at java.lang.J9VMInternals.verifyImpl(Native Method)
    at java.lang.J9VMInternals.verify(J9VMInternals.java:59)
    at java.lang.J9VMInternals.initialize(J9VMInternals.java:120)
    at com.wru.DisplayEntry.<init>(DisplayEntry.java:35)
    at org.apache.jsp.public_.wru_jsp._jspService(wru_jsp.java:187)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
    at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    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:175)
    at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    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:263)
    at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
    at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
    at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767)
    at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697)
    at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889)
    at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
    at java.lang.Thread.run(Thread.java:799)
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