Doctrine 2 cascade={''remove"} doesn't seem to be working

Hi I have the following class

namespace MP\User\RegistrationBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Persistence\PersistentObject;
use MP\Services\SiteAdapterBundle\Util\String;
/**
 * @ORM\Table(name="customer")
 * @ORM\Entity(repositoryClass="MP\User\RegistrationBundle\Repositories\CustomerRepository")
 * @ORM\HasLifecycleCallbacks
 */
class Customer extends PersistentObject
{
    
    /**
     * @var string $id
     * @ORM\Id
     * @ORM\Column(name="icustomer_id", type="integer")
     */
    protected $id;

    /**
     * @var string $addresses
     * @ORM\OneToMany(targetEntity="MP\User\RegistrationBundle\Entity\Address", mappedBy="customer", cascade={"remove"})
     */
    protected $addresses;

With the following relationship

/**
 * MP\User\RegistrationBundle\Entity
 */
namespace MP\User\RegistrationBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Persistence\PersistentObject;

/**
 * @ORM\Table(name="custdeladd") 
 * @ORM\Entity(repositoryClass="MP\User\RegistrationBundle\Repositories\AddressRepository")
 */
class Address extends PersistentObject
{
      /**
       * @var integer $suffix
       * @ORM\Column(name="isuffix", type="integer") 
       * @ORM\Id
       */
      protected $suffix;

      /**
       * @var object $customer
       * @ORM\ManyToOne(targetEntity="MP\User\RegistrationBundle\Entity\Customer", inversedBy="addresses", cascade={"persist"})
       * @ORM\JoinColumn(name="icustomer_id", referencedColumnName="icustomer_id")
       */
      protected $customer;
}

Does anybody know why when the customer gets deleted the addresses aren't? Many thanks