[support] Call to undefined function content_types() i

I installed the CCK module, And i check in module in the administrator panel, then i created the events content type, for that i click the add fields , Then error message was through *Fatal error*: Call to undefined function content_types() in * E:\WorkingProjects\PHPProjects\plasticstoday\modules\cck\userreference.module * on line *387*