Can i change 2 columns to 1?

Is it a page that you want to create?

yes i need to start again

Try creating a separate page template.
Ex:
1. Go to your theme’s folder and copy page.php and rename it to something like fullwidth-page.php

2. On top of the file is <?php get_header(); ?> change it to

<?php
/*
 * Template Name: Full Width Template
 */
get_header(); ?>

3. Look for this line <div id="content" class="narrowcolumn"> and add another class like “fullwidth” or whatever so it would look like <div id="content" class="narrowcolumn fullwidth">

4. Scroll down to the bottom and remove <?php get_sidebar(); ?>

5. Next, open style.css and add these lines at the bottom…

/* Custom CSS */
.fullwidth, .fullwidth .post,
.fullwidth .entry {
	width: 960px;
}

6. When you create a page and want to have a full width page then just change the template to the new page template that you created (e.g. Full Width Template)

7. Save/publish and check the page

Note: You might have to do some more adjustments on the styles if it looks weird.

Thanks i’ll try that now

YES! Your advice has worked again,thanks alot!