How to add Search Box to Atahualpa Bar1?

I want put the search box in the atahualpa bar1. I tried the solution proposed in a post of 19 April 20011by adding
<?php get_search_form();?> in Configure Header Area + css
.searchform {
left: 390px;
bottom: 32px;
position: relative;
width: 180px;
height: 0px;
} in css insert
it only works if I put the widget in one of the sidebars!
I have two boxes for research: in a sidebar and the other in the menu1. What can be the solution?
I just want a search box in the bar1

thanks

wp :3.2.1
atahualpa : 3.7.3
url: www.tamoudre.org
but I did the tests in localhost