Render the message form

Hi all,

i want to put the form of the user profile page. so i created a block with the following code

  module_load_include('pages.inc','privatemsg');
  $recipients = array(user_load(arg(1)));
  $subject = 'Again, this is just a default that can be changed';
  print drupal_get_form('privatemsg_new', $recipients, $subject);

But it only print "Array", i used print_r() to print return value of drupal_get_form and it does contains the form object. so how could i print the form correctly?

i read the post here but i really dun understand how it could be solved by using $vars['contact'].

i also read the post Embed Privatemsg pages but i still couldn't get it.

Thanks.

Kit