PDO Adaptive Server connection failed when connecting to MSSQL server in FuelPHP - php

Question

FuelPHP seems to be doing something odd when I try to connect to a MSSQL database via PDO.
Working Outside of FuelPHP
I have tried the following in a vanilla PHP page on my local server:
<?php
$mssql = new \PDO('dblib:host=<IP OF HOST>;dbname=<DBNAME>', '<USER>', '<PASS>');
And everything works fine. It connects and I can easily query the DB like I would expect.
NOT Working Inside of FuelPHP
However, when I try adding the connection in config/db.php with basically the same information an exception is thrown.
<?php
return array(
'mssql' => array(
'connection' => array(
'dsn' => 'dblib:host=<IP OF HOST>;dbname=<DBNAME>',
'username' => '<USER>',
'password' => '<PASS>',
),
'type' => 'pdo',
'table_prefix' => '',
),
);
And subsequently try to query the DB within FuelPHP like so:
$q = \DB::select()
->from('table')
->limit(5);
$r = $q->execute('mssql');
The following exception is thrown: Fuel\Core\Database_Exception [ 20002 ]: SQLSTATE[01002] Adaptive Server connection failed (severity 9)
What the kicker is when I try to just do my original basic connection inside of a controller of FuelPHP I get the same error message. So it appears FuelPHP is playing havoc with even a normal PDO connection.
Example of basic connection attempt within a FuelPHP controller.
<?php
class Controller_Welcome extends Controller
{
public function action_index()
{
$mssql = new \PDO('dblib:host=<IP OF HOST>;dbname=<DBNAME>', '<USER>', '<PASS>');
}
}
For reference I am using PHP 5.3.16 and using FreeTDS to connect from my OS X laptop. (This shouldn't be an issue though since the vanilla version works.)