Automatic validation is not working with dispatch action

[Hussein Baghdadi]

Hi.
I have have a dispatch action with two methods: view (to view the cart) , add (to add a book to cart).
This dispatch action have an action form associated with it, this form uses automatic validation (not javascript).
The previous form is used by add method.
Here is a snippet:

<action path="/action/cart" name="addToCartForm" input="/bookDetails.jsp" scope="request" 
       parameter="operation"
       type="org.springframework.web.struts.DelegatingActionProxy">
       <forward name="cart" path="/cart.jsp"/>
       <forward name="addToCartSuccess" path="/bookDetails.jsp"/>
       <forward name="addToCartFail" path="/bookDetails.jsp"/>
</action>

Upon sucess, bookDetails.jsp displays a message, upon fail , another message.
The problem is when /action/cart.do?operation=view is called , bookDetails.jsp displayed again.
The problem solved when input attribute and the accompanying entry in validation.xml removed.
But validation should happened, how to over come this problem ?