not getting tasks for a given project

[stevencmon]

The following is not returning the set of tasks for a given project:

// then we’ll get the Task information
$related_tasks_parameters = array(
‘session’ => $suitecrm_session_id,
‘module_name’ => “Project”,
‘module_id’ => $project_id,
‘link_field_name’ => ‘projects_project_tasks’,
‘related_module_query’ => ‘’,
‘related_fields’ => array(‘id’,‘name’,‘date_start’,‘date_finish’),
‘related_module_link_name_to_fields_array’ => array(),
‘limit’ => 2,
‘deleted’ => 0,
);
$related_result = call(“get_relationships”, $related_tasks_parameters, $suitecrm_url);

it just returns an empty set. What am I missing?

The following returns me all doucments associated with a project:

// then we’ll get the Project information
$related_documents = array(
‘session’ => $session_id,
‘module_name’ => “Project”,
‘module_id’ => $project_id,
‘link_field_name’ => “documents_project_1”,
‘related_module_query’ => “”,
‘related_fields’ => array(“id”,“name”,“document_type_c”,“document_subcategory_c”,“date_modified”,“description”),
‘related_module_link_name_to_fields_array’ => array(),
‘limit’ => ‘2’,
‘deleted’ => 0,
);
$related_result = call(“get_relationships”, $related_documents, $suitecrm_url);