Wigdet() instance not populated?

Hi,

I have written this simple widget. however when It comes to displaying the widget using the widget() I am finding the $instance not populated. Im pretty much pulling my hair out as this is quite simple, a second look would help please!

————————————–

<?php

/*
Plugin Name: CV widget
Plugin URI: NONE
Description: Grabs and displays cv info based on content type
Author: Dave Martin
Version: 1
Author URI:
*/

class cvWidget extends WP_Widget
{

	function cvWidget()
	{
		$widget_options = array(
			'classname' => 'cv-widget',
			'description' => 'Daves CV widget');

		parent::WP_Widget('cv_Widgeted','Daves CV Widget', $widget_options);

	}

	function form($instance){
		?>
		<label for="<?php echo $this -> get_field_id('title'); ?>">Name</label>
		Title:
		<input id="<?php echo $this -> get_field_id('title'); ?>"
		name="<?php echo $this -> get_field_name('title'); ?>"
		value="<?php echo $instance['title'];?>" />

		<?php $post_types = get_post_types('', 'names');?>

		<label for="posttype">Post Type:</label>
		<select id="<?php echo $this -> get_field_id('posttype'); ?>"
				name="<?php echo $this -> get_field_name('posttype'); ?>"

			>
		<?php
		foreach ($post_types as $post_type) {
			echo '<option value="'.$post_type.'"';
			if ($instance['posttype'] == $post_type) {
				echo 'selected="selected"';
			}
			echo'>' . $post_type . '</option>';
		}
		echo '</select>';
		?>
		<br/>
		<label for="posttype">Ammount:</label>
		<input id="<?php echo $this -> get_field_id('pullammount'); ?>"
		name="<?php echo $this -> get_field_name('pullammount'); ?>"
		value="<?php echo esc_attr($instance['pullammount'])?>" />

		<?php	print_r($instance);
	}

	function widget($args,$instance){

		print_r($instance); <-------HERE not populated (empty array)
	}

}

	function cvWidget_init(){
		register_widget("cvWidget");
	}

		add_action('widgets_init', 'cvWidget_init');