Struts 2 Interceptor - Não consigo chamar o interceptor

package *******************;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class LoginInterceptor extends AbstractInterceptor {

	private static final long serialVersionUID = -6073110797987730212L;

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		System.out.println("Testando Interceptor");
		return invocation.invoke();  
			
	}

	
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <constant name="struts.devMode" value="true" />
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />  
	
	<!-- Configuration for the default package. -->
    <package name="default" extends="struts-default">
	
		<interceptors>
            <interceptor name="loginInterceptor" class="br.mil.marinha.spi.interceptors.LoginInterceptor" />
        	<interceptor-stack name="sispnrStack">
        		<interceptor-ref name="loginInterceptor" />    
                <interceptor-ref name="defaultStack" /> 
        	</interceptor-stack>
        </interceptors>
        
       <default-interceptor-ref name="sispnrStack" />  
        
        <global-results>
            <result name="login">login.jsp</result>
        </global-results>

	</package>
</struts>

System.out.println("Testando Interceptor");