To attache a modules to an article You will need a menu item id first. Which means that You need to create a menu element for this article or a category view if You want to have sidebar in each articles from this category.
Thanks, it works can you tell me one more thing? i want to put there something more than just "menu". some related articles, advertisment and other things. you guys know some modules to do that? i found that - http://sidebars.ijoomla.com/10-sidebar-types/ - but $77 it is to cheap for me