Display the_post_thumbnail a the top of a page?

[agileapricot 0]

I'd like to display the features image at the top of the page. I've tried the following but not been able to get it to work.

	function add_feature_image(){
		echo the_post_thumbnail('medium');
	}
	
	add_action('pagelines_before_maincontent', 'add_feature_image');

[Andrew 207]

add `global $post;` to the hooked function..

[agileapricot 0]

You mean like this? Sadly it doesn't seem to work either.

add_action('pagelines_inside_top_theloop', 'addthis');
	
	// function name
	function addthis(){
		global $post;
		echo the_post_thumbnail();
	}