Call to undefined method MemberStatus :: all ()

After creating a model, one of them usually has this problem:

  Symfony \ Component \ Debug \ Exception \ FatalErrorException (E_UNKNOWN)   Call to undefined method MemberStatus :: all ()

The table in the database exists and was created by migrate:

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class MemberStatus extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('member_status', function(Blueprint $table)
        {
            $table->increments('id');
            $table->integer('id_member_status');
            $table->string('member_status',100);
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('member_status');
    }

}

And the seeder:

class MaritalStatusSeeder extends Seeder{   
    public function run(){      
        DB::table('marital_status')->delete();      
        $marital = array(                               
            array(              
                    'id_marital_status'     =>  1,
                    'marital_status'        =>  'Solteiro',                 
                    'created_at'            =>  new DateTime,
                    'updated_at'            =>  '',
            ),
            array(              
                    'id_marital_status'     =>  2,
                    'marital_status'        =>  'Casado',                   
                    'created_at'            =>  new DateTime,
                    'updated_at'            =>  '',
            ),
            array(              
                    'id_marital_status'     =>  3,
                    'marital_status'        =>  'Separado',                 
                    'created_at'            =>  new DateTime,
                    'updated_at'            =>  '',
            ),
            array(              
                    'id_marital_status'     =>  4,
                    'marital_status'        =>  'Divorciado',                   
                    'created_at'            =>  new DateTime,
                    'updated_at'            =>  '',
            ),
            array(              
                    'id_marital_status'     =>  5,
                    'marital_status'        =>  'Viuvo(a)',                 
                    'created_at'            =>  new DateTime,
                    'updated_at'            =>  '',
            ),
        );
        DB::table('marital_status')->insert($marital);              
    }   
}

The model was then created:

class MemberStatus extends Eloquent{
    protected $table = 'member_status';
    public $timestamps = true;
    protected $fillable = array(    
        'id_member_status',
        'member_status',
    );
}

When calling in the application a test: var_dump (MemberStatus :: all ());

Give this error:

  Symfony \ Component \ Debug \ Exception \ FatalErrorException (E_UNKNOWN)   Call to undefined method MemberStatus :: all ()

It has happened in another model, what I did was create the table again. Dai worked, now not even with that.

Does anyone know what problem this is?