Predeployed portlet is not working

Hi All,
I am using RAD6.0 and Portal server 5.1 test environment. I have created JSF portlet and successfully deployed using RAD. When I customized the Portal server settings and deployed the Portlet as a War file. I am getting portlet is unavailable in browser.

when I checked the log file its showing following error.

com.ibm.wps.pe.om.definition.impl.WebApplicationDefinitionImpl getServletContext
EJPPG0003E: ServletContext lookup for /wps/PA_1_0_1385 returned the portal context. It has to be a different one.

2007.01.11 08:27:42.034 E com.ibm.wps.engine.tags.PortletRenderTag doStartTag
EJPEJ0066E: The portlet could not be rendered. - StackTrace follows...

2007.01.11 08:27:42.034 E com.ibm.wps.engine.tags.PortletRenderTag doStartTag
javax.portlet.UnavailableException: WebApplication is stopped
at com.ibm.wps.pe.om.definition.impl.WebApplicationDefinitionImpl.getWebAppContext(WebApplicationDefinitionImpl.java:292)
at com.ibm.wps.pe.om.definition.impl.WebApplicationDefinitionImpl.getServletContext(WebApplicationDefinitionImpl.java:163)
at com.ibm.wps.pe.om.definition.impl.ServletDefinitionImpl.getRequestDispatcher(ServletDefinitionImpl.java:250)
at com.ibm.wps.pe.pc.std.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:186)
at com.ibm.wps.pe.pc.std.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:168)
at com.ibm.wps.pe.pc.std.invoker.impl.PortletInvokerImpl.render(PortletInvokerImpl.java:97)
at com.ibm.wps.pe.pc.std.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:110)
at com.ibm.wps.pe.pc.PortletContainerImpl.doRenderPortlet(PortletContainerImpl.java:545)
at com.ibm.wps.pe.ext.render.AbstractRenderManager.performService(AbstractRenderManager.java:255)
at com.ibm.wps.pe.pc.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:100)
at com.ibm.wps.engine.tags.PortletRenderTag.doStartTag(PortletRenderTag.java:155)
at org.apache.jsp._Control._jspService(_Control.java:1926)
at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java:89)
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:385)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java:739)......

Anybody can you help me how to solve this problem .. :-(

Thanks and Regards,
Roy.