Ajax just works once after web loaded!

Hi,

I’m trying to make ajax loader post on my own theme.
in loader button, i give the button link like this :
<a href="<?php echo 'page/'.($paged+1); ?>" so it when it rendered, it will looks like <a href=”page/2″. i’m trying to use ajax to call that, the ajax code is like this :

$("#load-more").click(function(event){
		event.preventDefault();
		var value = $(this).attr("href");

		$.ajax({
			url: value,
			success: function(back){
				$("#loader-post").remove();
				$("#content").append(back);
			}
		});
	});

after that, in top of header.php i write code to handle that request :

$GLOBALS['paged'] = (get_query_var('paged')) ? get_query_var('paged') : 1;
    if($GLOBALS['paged'] > 1){
      open_post($paged);
      exit();
  }

all the code its run perfectly when i’m trying to load more post after the web loaded (the ajax run perfect to call /paged/2) but after that, the ajax is not working, its just redirecting to /paged/3, the post content is not append, i dont have any idea about this, anybody knows the error ??

thanks,