what to use Data picker in struts
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I am using Struts 2 - The Ajax Tags in my project i added struts2-dojo-plugin-2.1.8.1.jar to lib folder in my project,and <%@ taglib prefix="sx" uri="/struts-dojo-tags"%> is also added,<sx:head /> is added in header,<sx:datetimepicker name="deliverydate" label="Delivery Date"
displayFormat="dd/MM/yyyy" />  is also added inside body tag in page but i am getting error as java.lang.ClassNotFoundException: com.opensymphony.xwork2.util.logging.LoggerFactory,
can any one help me,
 This my error log..

    'java.lang.ClassNotFoundException: com.opensymphony.xwork2.util.logging.LoggerFactory
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
	at org.apache.struts2.dojo.components.DateTimePicker.<clinit>(DateTimePicker.java:184)
	at org.apache.struts2.dojo.views.jsp.ui.DateTimePickerTag.getBean(DateTimePickerTag.java:59)
	at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49)
	at org.apache.jsp.login_jsp._jspx_meth_sx_005fdatetimepicker_005f0(login_jsp.java:277)
	at org.apache.jsp.login_jsp._jspx_meth_s_005fform_005f0(login_jsp.java:196)
	at org.apache.jsp.login_jsp._jspService(login_jsp.java:117)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)
'

 