JBoss xercesImpl.jar conflicts with xerces.jar within Ears/wars

I have an application (.war file) that uses a lib called xerces.jar located at .war /WEB-INF/lib directory. I run JBoss in cluster mode. So, after deploy, when I run my application, I got an exception with the xml libs. I guess it's a classloader problem. MY application tries to use the JBoss xml classes intead of it's own. I discovered the problem was with the xerces.jar and xercesImpl.jar because I deleted the line below from the <JBOSS_HOME>/bin/run.sh:

-Djava.endorsed.dirs=...

I searched for a solution and discovered jdk versions before 1.5 have a bug with xml, so I tried the solution above and all worked fine. Now my application use it's own xerces instead of JBoss xerces.
I think my solution is a workaround. I would like to know if there is a better way to solve this problem. Is there ?
The exception is below.
Than you.

Alan

The exception:

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.struts.actions.DispatchAction.perform(DispatchAction.java :236)
at org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1787)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
at org.apache.struts.action.ActionServlet.doPost (ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java :81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke (CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java :407)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket (PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.VerifyError: (class: org/apache/soap/util/xml/XercesParserLiaison, method: read signature: (Ljava/lang/String;Ljava/io/Reader;)Lorg/w3c/dom/Document Incompatible object argument
for function call
at org.apache.soap.rpc.Call.<init>(Call.java)
at org.apache.soap.rpc.Call.<init>(Call.java)
at com.attachmate.mcs.agent.impl.SOAPPackager.a(SOAPPackager.java )
...