http://devnet.jetbrains.net/thread/132778
You might have no suitable servlet api classes in classpath or classes for Struts could not be found or have wrong class version (e.g. compiled for JDK 6)
http://www.coderanch.com/t/56162/Struts/JSP-struts-tag-error
You received the exception because the class org.apache.struts.taglib.logic.IterateTei is not in your classpath.
If you're using the newest version of Struts (at this time 1.3.

, make sure that the struts-taglib-1.3.8.jar is in your classpath.
ajuda???