Search in Calls for Related Project doesn't seems to work..?!

[dekleinemedia]

Hi,

I have a many to many relationship between Project and Calls.

Now I have created a new Project, and have a subpanel 'Calls'. When I create a new 'Call' within this project this 'Call' is listed in ListView of Calls Module.

Now I want to search in 'Calls' module for 'related project'.

In Basis Search when I choose the related project and click 'select' i get the Pop-up screen.
There I select the related Project. Then I hit the button 'search' but then the ListView of 'Calls' is empty...?

See screenshots


How is this possible?
This is my searchdefs.php file

 <?php
$searchdefs ['Calls'] = 
array (
  'layout' => 
  array (
    'basic_search' => 
    array (
      'parent_name' => 
      array (
        'width' => '10%',
        'label' => 'LBL_LIST_RELATED_TO',
        'default' => true,
        'name' => 'parent_name',
      ),
    ),
    'advanced_search' => 
    array (
      'acc_name_c' => 
      array (
        'width' => '10%',
        'label' => 'LBL_ACC_NAME',
        'default' => true,
        'name' => 'acc_name_c',
      ),
    ),
  ),
  'templateMeta' => 
  array (
    'maxColumns' => '3',
    'widths' => 
    array (
      'label' => '10',
      'field' => '20',
    ),
  ),
);
?>  

Please help me with this. Thanks in advance