Edit Tag in frontend

I have a problem when i try to modify articles in front end.
I don't use K2 but the traditional joomla article's sistem.
When i modify an article in front end, i can't add or remove tags and if i save the article, it delete the previous tag i added by back end interface.
How can i resolve it?

Please open file template/html/com_content/form/edit.php and add this code :

Code: Select all

<div class="formelm">
      <?php echo $this->form->getLabel('tags'); ?>
      <?php echo $this->form->getInput('tags'); ?>
      </div>

right after :

Code: Select all

<div class="formelm">
      <?php echo $this->form->getLabel('publish_down'); ?>
      <?php echo $this->form->getInput('publish_down'); ?>
      </div>