Saving checkbox value in wordpress widget issue

[knAlestA]

I created a custom Flickr Widget for Wordpress and successfully set up an options form for users to enter their Flickr information, but I cannot get the checkbox in the form to save whether or not it is checked. Any help would be greatly appreciated! Here are my widget(), form(), and update() functions:\[code\]function widget($args, $instance) { extract($args); $title = apply_filters('widget_title', $instance['title']); $displaynum = $instance['displaynum']; $flickrid = $instance['flickrname']; $num = 6; $feed = new SimplePie($instance['feed']); $feed->handle_content_type(); $photostream = $instance['show_photostream'];function update($new_instance, $old_instance) { $instance = $old_instance; $instance['title'] = strip_tags($new_instance['title'] ); $instance['displaynum'] = strip_tags($new_instance['displaynum'] ); $instance['feed'] = $new_instance['feed']; $instance['flickrname'] = $new_instance['flickrname']; $instance['show_photostream'] = (bool) $new_instance['show_photostream']; return $instance;}function form($instance) { $defaults = array ( 'title' => 'My Recent Flickr Uploads', 'displaynum' => 6, 'feed' => 'http://api.flickr.com/services/feeds/photos_public.gne?id=33927859@N06&lang=en-us&format=rss_200', 'flickrname' => 'rastajellyfish', 'show_photostream' => isset( $instance['show_photostream'] ) ? (bool) $instance['show_photostream'] : false ); $instance = wp_parse_args( (array) $instance, $defaults); ?>\[/code\]Any help would be greatly appreciated!!!