Session variables not setting correctly - php

Question

I am trying to set a session variable from page to another. It was working on my localhost but then I uploaded it to my server and now it fails. I have done some basic bug tests, and it will print at specific points, I have labeled them in the code. Here is the code the code I am using
//PAGE 1
session_start();
if(isset($_REQUEST['id'])){
$_SESSION['id'] = $_REQUEST['id'];
//prints here just fine then fails after
header('location: app.php');
}elseif($_POST){
if(isset($_SESSION['error'])){
unset($_SESSION['error']);
}
$questions = array();
for($i = 1; $i <= 11; $i++){
$questions['q'.$i] = $_POST['q'.$i];
}
$check = "";
foreach($questions as $key => $val){
$check .= $val;
}
$metreq = strcmp($check, "1111-1-1-1-11-1-1");
if(!$metreq){
$_SESSION['questionaire'] = $questions;
header("location: app.php");
}else{
header('location: nq.php');
}
}
///PAGE 2
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
session_start();
require_once('inc/state_list_options.php');
if(isset($_SESSION['questionaire']) || isset($_SESSION['id'])){
$id = $first_name = $middle_name = $last_name = $suffix = $address = $city = $state = $zip = $phone_area = $phone_exch =
$phone_num = $phone2_area = $phone2_exch = $phone2_num = $email_address = $birth_month = $birth_day = $birth_year =
$job = $referred = "";
$selected = "selected";
$questions = array();
//here we will generate a session id that is the code passed from the link clicked by the user
$conn = mysql_connect('host', 'user', 'password');
mysql_select_db('db', $conn);
if($conn){
if(isset($_SESSION['id'])){
$id = $_SESSION['id'];
$q = "SELECT * FROM eagle.pre_application WHERE id = '$id'";
$r = mysql_query($q, $conn);
$row = mysql_fetch_assoc($r);
$first_name = $row['first_name'];
$middle_name = $row['middle_name'];
$last_name = $row['last_name'];
$suffix = $row['suffix'];
$address = $row['address'];
$city = $row['city'];
$state = $row['state'];
$zip = $row['zip'];
$phone_area = $row['phone_area'];
$phone_exch = $row['phone_exch'];
$phone_num = $row['phone_num'];
$phone2_area = $row['phone2_area'];
$phone2_exch = $row['phone2_exch'];
$phone2_num = $row['phone2_num'];
$email_address = $row['email_address'];
$birth_month = $row['birth_month'];
$birth_day = $row['birth_day'];
$birth_year = $row['birth_year'];
$questions['q1'] = $row['q1'];
$questions['q2'] = $row['q2'];
$questions['q3'] = $row['q3'];
$questions['q4'] = $row['q4'];
$questions['q5'] = $row['q5'];
$questions['q6'] = $row['q6'];
$questions['q7'] = $row['q7'];
$questions['q8'] = $row['q8'];
$questions['q9'] = $row['q9'];
$questions['q10'] = $row['q10'];
$questions['q11'] = $row['q11'];
$_SESSION['questionaire'] = $questions;
}
$q2 = "SELECT job_posting.id, job_posting.title, location.city, location.state
FROM eagle.job_posting
LEFT JOIN eagle.location
ON job_posting.location__Id = location.id";
$j = mysql_query($q2, $conn);
?>
<!-- job application goes ehre -->
<?
}else{
$_SESSION['error'] = "Please fill out the questionaire before completing the applicationn.";
header('location: index.php');
exit;
}
}else{
echo "There is an error";
}
?>
I'm not 100% sure where to go from this point forward. I was thinking that it was the headers causing and issue, but that has never appeared so at this poitn I am baffled. Please let me know what you think about this. If you need additional code or further examples please let me know and I can provide them for you. Thank you in advance to anyone who stops by to help!
EDITS/DEVELOPMENTS/UPDATES
9:07 AM: Using developer's tools on chrome it is now receiving a 500 server error when submitting to page 2
9:16 AM Removed errors found with the require_once(''); There was an error in the path. Now it just automatically goes to the redirect on page 2 even if a variable is manually passed in the header via the address bar. I'm stumped still. code updated to reflect changes