Dear xwiki experts, I politely ask for assistance, since many-days-troubleshooting on my own brought no success. I'm still getting JBoss Application Server errors, as described below. What am I doing wrong? All steps are followed as described on xwiki.org. Many thanks in advance for your expertise! MY INFRASTRUCTURE: DEBIAN 5.0.1 JBoss GA 5.0.1 (no add-ons, no other applications) JDK 5.0 PostgreSQL 8.3.6-1 postgresql-8.3-604.jdbc4.jar JDBC Java Driver MY INSTALLATION STEPS: 1. Installed JBoss GA 5.0.1 2. created directory /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war 3. copied the content of xwiki-enterprise-web-1.8.1.war into directory /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war/ 4. Uncommented the resource-ref in /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war/WEB-INF/web.xml as follows: <resource-ref> <description>DB Connection</description> <res-ref-name>jdbc/XWikiDS</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> 5. Modified the /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war/WEB-INF/hibernate.cfg.xml as follows: <property name="connection.url">jdbc:postgresql://localhost:5432/xwiki</property> <property name="connection.username">xwiki</property> <property name="connection.password">xwiki</property> <property name="connection.driver_class">org.postgresql.Driver</property> <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property> <property name="connection.provider_class">com.xpn.xwiki.store.DBCPConnectionProvider</property> <property name="connection.pool_size">2</property> <property name="statement_cache.size">2</property> <mapping resource="xwiki.hbm.xml"/> <mapping resource="feeds.hbm.xml"/> 6. Downloaded the jboss-web.xml and placed it into the directory /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war/WEB-INF 7. Installed PostgreSQL 8.3.6-1 per command apt-get insall postgresql 8. Executed following commands as postgres user: # createuser xwiki -S -D -R -P -Upostgres # createdb xwiki -Eunicode -Oxwiki -Upostgres 9. Copied postgresql-8.3-604.jdbc4.jar Java Driver into /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war/WEB-INF/lib 10. Uncommented xwiki.store.hibernate.path=/WEB-INF/hibernate.cfg.xml line in the file /usr/local/jboss.ga.5.0.1/server/default/deploy/xwiki.war/WEB-INF/xwiki.cfg JBOSS GA ERROR: When I start the JBoss Application Server, I get the following error: 11:12:19,299 INFO [TomcatDeployment] deploy, ctxPath=/ 11:12:19,793 INFO [TomcatDeployment] deploy, ctxPath=/jmx-console 11:12:20,290 INFO [TomcatDeployment] deploy, ctxPath=/xwiki 11:12:21,311 ERROR [JBossContextConfig] XML error parsing: context.xml org.jboss.xb.binding.JBossXBRuntimeException: Failed to create a new SAX parser at org.jboss.xb.binding.UnmarshallerFactory$UnmarshallerFactoryImpl.newUnmarshaller(UnmarshallerFactory.java:100) at org.jboss.web.tomcat.service.deployers.JBossContextConfig.processContextConfig(JBossContextConfig.java:557) at org.jboss.web.tomcat.service.deployers.JBossContextConfig.init(JBossContextConfig.java:543) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:279) -- View this message in context: http://n2.nabble.com/XWIKI-installation-error-on-JBOSS-5.0.1--%21%21%21PLEAS... Sent from the XWiki- Users mailing list archive at Nabble.com.