Problem in edit-view with data from a HABTM-relationship

Hello,

I'm developing a small application to manage some Server-related data. Currently the app is running on cake1.2 ant the migration to cake 2.1 is making me some headache.

Here ist the problem:

Tables:
Device (has many) Detail (belongs to) DetailType
sample data:
Server1           0815-1234           serial-number
Server1           1234-5678           inventory-number
Server2           9876-1234           serial-number

in the edit-view i'll show all details belonging to the device including the detailTypes. It woll not work under 2.1

here ist the code from edit.ctp
                       ....................
            <?php
                     $counter = 0;
                     foreach ($this->data['Detail'] as $detail):
                     echo $this->Form->hidden('Detail.'.$counter.'.id',array( 'value' => $detail['id']));
                        echo $this->Form->input('Detail'.$counter.'DetailType'.'name', array(
                        'type' => 'select',
                        'label' => 'Detail Art ',
                        'selected' => $this->Form->data['Detail'][$counter].'detail_type_id',
                        'div'=>'formfield',
                        'error' => array(
                            'wrap' => 'div',
                            'class' => 'formerror'
                            )
                        ));
                        echo $this->Form->input('Detail.'.$counter.'.name',  array(
                        'label' => 'Detail',
                        'div'=>'formfield',
                        'error' => array(
                            'wrap' => 'div',
                            'class' => 'formerror'
                            )
                        ));
                          $counter++;
                     endforeach;
            ?>

The selectBox(Detail Type) is empty, no option available. in the Textbox the correct value is displayed.
Die SelectBox in welcher der DetailType auftauchen soll, bleibt leer, im Textfeld steht der richtige Wert drin.

content of $detail:

Array (     [id] => 152     [device_id] => 110     [name] => 2190204-0000     [created] => 2011-10-07 08:58:11     [modified] => 2012-01-27 15:19:09     [status] => 1     [detail_type_id] => 1     [Device] => Array         (             [id] => 110             [name] => Server-01             [description] => Host 1             [installation] => 2011-10-07 08:55:00             [height] => 2             [position] => 22             [powersupply] => 2             [ram] =>              [isvirtual] => 0             [isparent] => 1             [hddsize] =>              [cputype] =>              [san] => 1             [condition_id] => 1             [fowner_id] => 5             [towner_id] => 6             [product_id] => 5             [rack_id] => 7             [system_id] => 12             [servicela_id] => 3             [parent_id] =>              [comment] => - Host for VMs             [created] => 2011-10-07 08:58:11             [modified] => 2012-01-27 15:19:09             [status] => 1         )      [DetailType] => Array         (             [id] => 1             [name] => Inv.-Number             [description] => inventory-number             [created] => 2009-09-06 22:47:21             [modified] => 2009-09-08 16:42:18             [status] => 1         )  )

I hope the description is detailled enough, otherwise I can add more information.
anyone any ideas?

(allready postet in the german CakePHP-Group)

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