anyone know if this does work with 1.1?

Did not work even on 1.1.2

I try to install it,and when i went to charts tabs,Now I got one new error message
''
Fatal error: Call to a member function getProjectPermission() on a non-object in D:\WWWROOT\activecollab\application\modules\milestones\models\Milestones.class.php on line 48
''

Somebody can help me?

Fatal error: Call to a member function getProjectPermission() on a non-object in /var/www/vhosts/demo/subdomains/projects/httpdocs/activecollab/application/modules/milestones/models/Milestones.class.php on line 48

I already find the problem point
please compare the follow lines in file on_project_tab.php :
General or Other Version:

function charts_handle_on_project_tabs(&$tabs, &$project) {
    $tabs->add('charts', array(
      'text' => lang('Charts'),
      'url' => charts_module_url($project),
    ));
  } // files_handle_on_project_tabs

Changed:

function charts_handle_on_project_tabs(&$tabs,&$logged_user,&$project) {
    if($logged_user->getProjectPermission('charts',$project) >= PROJECT_PERMISSION_ACCESS) {
      $tabs->add('charts', array(
      'text' => lang('GanttCharts'),
      'url' => charts_module_url($project),
    ));
   }
  } // files_handle_on_project_tabs

So You can see the function charts_handle_on_project_tabs's pramaters difference,the working pramaters includes three "$tabs,$logged_user,$project"

Enjoy it!