Disable Requestvalidation On Particular View

i want disable RequestValidation on particular view in ASP.NET MVC 2.0 RTM. so i added some necessary to view Page directive section as below:

<%@ Page ValidateRequest="false" Language="C#" MasterPageFile="Path" Inherits="System.Web.Mvc.ViewPage<Path>" %>

but RequestValidation isn't Disabled! i also added RequestValidation Attribute to related action in controller as below:

[System.Web.Mvc.ValidateInput(false)]
public System.Web.Mvc.ActionResult Create(Model instance)
{
//Do here something
}
:') but RequestValidation isn't Disabled too!

in last try i set RequestValidation to false in Web.config file as below:

<pages validateRequest="false" />

RequestValidation still isn't turned off. Why?