Ok, maybe second time will be better
replace 'EXT:kopbsurveyext/class.kopbsurveyext.php:tx_kopbsurveyext';
with
'tx_kopbsurveyext';
because you just included kopbsurveyext/class.kopbsurveyext.php with
require_once(t3lib_extMgm::extPath('kopbsurveyext').'class.kopbsurveyext.php');
--
З повагою,
Бойчук Петро