Sessions with custom PHP code

I have some custom pages that I am trying to have a specific message show based on membership and the code that I have tried to piece together is not working. Can anyone help out?

PHP:

<?php session_start(); ?>
<?php
  if ($_SESSION['_amember_product_ids'] ==1) {
  print "<a href='LINK TO MOVIE'>Watch Movie IMAGE</a>";
  } elseif ($_SESSION['_amember_product_ids'] ==2){
  print "<a href='/member/member.php'>Movie for VIP Members Notice</a>";
  } else {
  print "<a href='/vsm/Sign_In.html'>Sign In</a>";
}?>

any help here?

Code:

<?php session_start(); ?>
<?php
  if ( count($_SESSION['_amember_product_ids']) ==1) {
  print "<a href='LINK TO MOVIE'>Watch Movie IMAGE</a>";
  } elseif ( count($_SESSION['_amember_product_ids']) ==2){
  print "<a href='/member/member.php'>Movie for VIP Members Notice</a>";
  } else {
  print "<a href='/vsm/Sign_In.html'>Sign In</a>";
}?>