Deploy on JRun 4

I tried to deploy an web application on JRun 4 but had no luck. I'd appreciater any help. Thanks in advance.

If I export a 1.3 WAR file, JRun refuses to deploy it.

1.4 WAR file can be sort of deployed, but when I run any JSP page, I get the following error:

javax.servlet.jsp.JspException: Cannot find FacesContext

at javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:405)

at com.sun.faces.taglib.jsf_core.ViewTag.doStartTag(ViewTag.java:105)

at jrun__Page12ejspa._jspService(jrun__Page12ejspa.java:51)

at jrun.jsp.runtime.HttpJSPServlet.service(HttpJSPServlet.java:43)

at jrun.jsp.JSPServlet.service(JSPServlet.java:119)

at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:91)

at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)

at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:252)

at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:527)

at jrun.servlet.http.WebService.invokeRunnable(WebService.java:168)

at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:451)

at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)

javax.servlet.ServletException: Cannot find FacesContext

at jrun.jsp.runtime.Utils.handleException(Utils.java:61)

at jrun.jsp.runtime.JRunPageContext.handlePageException(JRunPageContext.java:384)

at jrun__Page12ejspa._jspService(jrun__Page12ejspa.java:191)