Error occurs in WebSphere - validatation.js not found in /struts/template/css_xhtml

Hi, When I deploy struts2-showcase.war to WAS 6.1 and open in browser, it complained some .js files not found, such as dojo.js, ntify.js. And I click "Validation -> Client using css_xhtml" there's more .js file not found(Validation), the same error happend when I deploy my application into WAS.

Re: Error occurs in WebSphere - validatation.js not found in /struts/template/css_xhtml

Yes, I'm already check my application and struts2-showcase... I don't know why WAS can't found validataion.js in struts2-core.jar, because I see validation.js in Firebug... and If I change container from WAS to others like jetty or tomcat, it works fine... BTW... My WAS version is 6.1.0.0, do I nee