Thanks klas, that works!
Only for your info: if i set the field (free text) at first, i get a notice, also if i use default link options and remove to get link on other fields. But only if field is linked:
Undefined index: #__content in … /plugins/cck_storage_location/joomla_article/joomla_article.php on line 739
Undefined index: #__content in … /plugins/cck_storage_location/joomla_article/joomla_article.php on line 779
Trying to get property of non-object in /plugins/cck_storage_location/joomla_article/joomla_article.php on line 779
It works for me, and its only a notice, but it I'm interested what could cause this. (for live site the messages would be disabled, so its ok.)