CookingBook remove search box in the top

Ciao!
i registered the theme, but i cant remove the search bottom in the file top.php
I remove
<div class="menusearch" title="">
<?php get_search_form(); ?>
</div>
and i receive the message
Method Not Implemented

POST to /wp-admin/theme-editor.php not supported.

Please help me!

Summary of the problems

Good Morning
after activation (via Paypal) of CookingBook theme:
1.The Map in the Contact form is not appearing
2.I would like to remove the search box in top.php, but when i remove
<div class="menusearch" title="">
<?php get_search_form(); ?>
</div>
i receive the message
Method Not Implemented

POST to /wp-admin/theme-editor.php not supported.
3. How can i add informations in the footer.php?

I like very much your themes: i hope in your help and i'm sorry for my little english

Best Regards