IntelliJ 13 Create Struts 2 App

Hi I am new to IntelliJ IDE. I downloaded the IntelliJ 13 Ultimate for a month trail.
I create a Strust 2 app through "Create project", selecting "Java", then checking "Struts2" box. Then the IDE downloads the Struts2 jar for me.
After that, I just try to run it on local Tomcat 7.0 server right away. It gives the following errors.

Jan 17, 2014 9:26:07 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:532)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:514)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:142)

What did I miss here?

Thanks!