PHP try catch not working

I can connect to my database and I have checked the sql code but I get an network error 500. I commented out the try/catch and the page works.

any idea of what I can do to fix this problem

you can see my code:

include_once $_SERVER['DOCUMENT_ROOT'] . '/includes/magicquotes.inc.php'; include $_SERVER['DOCUMENT_ROOT']. '../custdb/db.inc.php';

try { $sql = 'SELECT typeid, type FROM types'; $result = $pdo->query($sql); } catch (PDOException $e) { $error = 'Error fetching Company Types: ' . $e->getMessage(); include 'error.html.php'; exit(); }

foreach ($result as $row) { $types[] = array( 'typeid' => $row['typeid'], 'type' => $row['type']

);

}

include 'types.html.php';