dynamic updated checkboxes from 1 table

Hello i am new to cakephp and running into a little problem.

I have 2 mysql tables accesses and systems:

CREATE TABLE IF NOT EXISTS `iam_db`.`accesses` (
`id` INT NOT NULL AUTO_INCREMENT,
`first_name` VARCHAR(255) NOT NULL,
`last_name` VARCHAR(255) NOT NULL,
`systems_id` INT NULL,
PRIMARY KEY (`id`),
FOREIGN KEY (`systems_id`))

CREATE TABLE IF NOT EXISTS `iam_db`.`systems` (
`id` INT NOT NULL AUTO_INCREMENT,
`name` VARCHAR(255) NOT NULL,
PRIMARY KEY (`id`))

I have baked my models, controllers and views, then filled the systems table with static input.

Now my problem. If i create a new access i just get an dropdown list for systems. Even if i edit the Accesses/add view with static options:

echo $this->Form->input('systems_id', array(
            'type' => 'select',
            'multiple' => 'checkbox',
            'options' => array(
                1 => 'test1',
                2 => 'test2',
                )
            )
        );

no checkboxes appear...? Is there anything to add in the accesses model or controller ?

I've read the cookbook section for the FormHelper->Checkbox but didnt find the answer, to get all my static systems as checkboxes...