"application.xml" validation error while migrating from JBoss 4.X to JBoss 5

Issue

• We get the following kind of deployment error while migrating an Application from JBoss EAP 4.x to JBoss EAP 5.x

vfsfile:/home/userone/jboss-eap-5.1/jboss-as/server/default_WAR/deploy/EJBApplication.ear/ -> org.jboss.deployers.spi.DeploymentException: Error creating managed object for vfsfile:/home/userone/jboss-eap-5.1/jboss-as/server/default_WAR/deploy/EJBApplication.ear/  

 DEPLOYMENTS IN ERROR:  
  Deployment "vfsfile:/home/userone/jboss-eap-5.1/jboss-as/server/default_WAR/deploy/EJBApplication.ear/" is in error due to the following reason(s): rg.xml.sax.SAXException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'library-directory'. One of '{"http://java.sun.com/xml/ns/javaee":display-ame, "http://java.sun.com/xml/ns/javaee":icon, "http://java.sun.com/xml/ns/javaee":module}' is expected. @ vfsfile:/home/userone/jboss-eap-5.1/jboss-as/server/default_WAR/deploy/EJBApplication.ear/META-INF/application.xml[7,22]

• The above exception occur with the following kind of "application.xml"

<?xml version="1.0" encoding="UTF-8"?>  
<application version="5" xmlns="http://java.sun.com/xml/ns/javaee"  
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
             xsi:schemaLocation="http://java.sun.com/xml/ns/javaee  
             http://java.sun.com/xml/ns/javaee/application_5.xsd">  
              <display-name>TestEAR_EJBDisplay </display-name>  
              <library-directory>lib </library-directory>  
              <module>  
                 <ejb id="EJB_aaa">TestEJB.1.2.3.jar </ejb>  
             </module>  
              <module>  
                 <web>  
                     <web-uri>TestApp.war </web-uri>  
                     <context-root>TestApp </context-root>  
                 </web>  
             </module>  
</application>