I'm sorry if it sounds like obvious question, but I cannot solve this... I'm using D7.15, customized Fusion subtheme and Display Suite to style the search result appearance. But all the times I get the search results page in fullscreen (no left or right sidebars) and I can't find the solution for this. No costomizations on search-results.tpl.php.  

please help! :/  

UPDATE: I'm using drupal core search, I have tried Search by page module too.