Unrecognized DAO PublishedArticleDAO!

Stack Trace:

File: /home/ojsunh/public_html/plugins/generic/webFeed/WebFeedGatewayPlugin.inc.php line 115
Function: DAORegistry::getDAO("PublishedArticleDAO")

File: /home/ojsunh/public_html/pages/gateway/GatewayHandler.inc.php line 230
Function: WebFeedGatewayPlugin->fetch(Array(0), Object(Request))

File: /home/ojsunh/public_html/lib/pkp/classes/core/PKPRouter.inc.php line 391
Function: GatewayHandler->plugin(Array(2), Object(Request))

File: /home/ojsunh/public_html/lib/pkp/classes/core/PKPPageRouter.inc.php line 231
Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(2), False)

File: /home/ojsunh/public_html/lib/pkp/classes/core/Dispatcher.inc.php line 143
Function: PKPPageRouter->route(Object(Request))

File: /home/ojsunh/public_html/lib/pkp/classes/core/PKPApplication.inc.php line 281
Function: Dispatcher->dispatch(Object(Request))

File: /home/ojsunh/public_html/index.php line 68
Function: PKPApplication->execute()