BeanLocator has not been set in 6.0.6

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 6.0.6 GA
• Fix Version/s: 6.0.6 GA
• Component/s: Workflow, Workflow > API, Workflow > API > Kaleo Engine
• Labels:
  • kaleo
• Environment: Tomcat 6.0.29 with Ubuntu 11.10

For this i check all the suggestion of community but none of them is worked for me.
If I delete the work & temp folder from tomcat webapps folder and restart the server then it works for once. If i make some changes (i.e add some sysout statements) and redploy it then it will give me the following errors.

07:53:23,622 ERROR [PortletBeanLocatorUtil:38] BeanLocator is null
com.liferay.portal.kernel.bean.BeanLocatorException: BeanLocator has not been set
at com.liferay.portal.kernel.bean.PortletBeanLocatorUtil.locate(PortletBeanLocatorUtil.java:40)
at com.liferay.query.QueryPortlet.duplicate(QueryPortlet.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.liferay.portal.kernel.portlet.LiferayPortlet.callActionMethod(LiferayPortlet.java:138)
at com.liferay.util.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:227)
at com.liferay.portal.kernel.portlet.LiferayPortlet.processAction(LiferayPortlet.java:69)
at com.liferay.util.bridges.mvc.MVCPortlet.processAction(MVCPortlet.java:199)
at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70)
at com.liferay.portal.kerne