trying to submit rich text editor content in asp.net mvc and getting "potentially dangerous Request.Form value was detected"

I am using TinyMCE in asp.net mvc and getting the error message "a potentially dangerous Request.Form value was detected" when trying to save the text from the TinyMCE editor. I set ValidateRequest="false" both in web.config and on the page. Any ideas?

From stackoverflow

• Just add the ValidateInput attribute to your action and set it to false.

  Like this.

  [ValidateInput(false)]
  public ActionResult Submit(string FormContent)
  {
  
  }
  

• To get this working in ASP.NET MVC 2.0, I also had to add

  <httpRuntime requestValidationMode="2.0" /> 
  

  to the

  <system.web> 
  

  section of my web.config file