Can anyone help me with this Zend exception?

An error occurred
Application error
Exception information:
Message: Resource ‘admin:news’ not found
Stack trace:
#0 /home4/xxxxx/public_html/library/Zend/Acl.php(774): Zend_Acl->get(‘admin:news’)
#1 /home4/xxxxx/public_html/library/Base/Controller/Action.php(40): Zend_Acl->isAllowed(‘administrator’, ‘admin:news’, ‘index’)
#2 /home4/xxxxx/public_html/library/Zend/Controller/Action.php(502): Base_Controller_Action->preDispatch()
#3 /home4/xxxxx/public_html/library/Zend/Controller/Dispatcher/Standard.php(289): Zend_Controller_Action->dispatch(‘indexAction’)
#4 /home4/xxxxx/public_html/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#5 /home4/xxxxx/public_html/library/Zend/Application/Bootstrap/Bootstrap.php(97): Zend_Controller_Front->dispatch()
#6 /home4/xxxxx/public_html/library/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run()
#7 /home4/xxxxx/public_html/index.php(74): Zend_Application->run()
#8 {main}
Request Parameters:
array (
‘module’ => ‘admin’,
‘controller’ => ‘news’,
‘action’ => ‘index’,
)

Thank you