Persons in the ADF cannot receive request parameters

I have an ADF web application with Faces 1.2

In my managed bean, I try to access the parameters of the mail request, but always get null.

This is my email form that I submit to Faces:

<form name="input" action="http://127.0.01:7072/myapplication/faces/login.jspx" method="post">
   <input type="hidden" name="user" id="user" value="myUserName"/>
   <input type="submit" value="Submit"/>
</form>

FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("user");

FacesContext.getCurrentInstance().getExternalContext().getRequest().getParameter("user");

But I always get null and the form method I get: GETis weird!