Need some help with widgets

I’m trying to add widgets to the content area of my website. The theme has 3 columns, 2 for posts and a sidebar for widgets. I was able to add widgets to the post/content area, but the problem is the widgets occupy 2 columns instead of 1. How can i fix that?

These are the codes I used:

-This one on functions:

if ( function_exists('register_sidebar') )
	register_sidebar(array(
'name'=>'Widget Pagina 1',
	'before_widget' => '<liclass="widget">',
	'after_widget' => '</li>',
	'before_title' => '<h3 class="widgettitle">',
	'after_title' => '</h3>',
  ));

-This one in index:

<?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('Widget Pagina 1') ) : ?>;
	   <?php endif; ?>

The website is: palcodeportivo.com.ve

Thanks.