[jboss-user] [JBoss jBPM] - MYSQL database connection within JBoss application(using JSF

I hope i am writing this question into the correct place. I am trying to make an application with JBoss. I have to establish connection with MYSQL database.I found some articles about how to connect to MYSQL database and i believe that i did everything correct. But this error message is shown on the web browser after i ran the program. Exception : javax.servlet.ServletException : Cannot get value for expression '#{homeBean.taskInstances}' javax.faces.webapp.FacesServlet.service(FacesServlet.java:109) org.jbpm.webapp.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:55) org.jbpm.web.JbpmContextFilter.doFilter(JbpmContextFilter.java:83) org.jbpm.webapp.filter.LogFilter.doFilter(LogFilter.java:59) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) root cause: javax.faces.facesException: Cannot get value for expression '#{homeBean.taskInstances}' org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421) org.apache.myfaces.application.jsp.JspViewhandlerImpl.renderView(JspViewHandlerImpl.java:234) org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:300) javax.faces.webapp.FacesServlet.service(facesServlet.java:95) <brZorg.jbpm.webapp.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:55) org.jbpm.web.JbpmContextFilter.doFilter(JbpmContextFilter.java:83) org.jbpm.webapp.filter.LogFilter.doFilter(LogFilter.java:59) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959495#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...