Scaffolding Fatal Error

[eluser]Unknown[/eluser]
hi, i followed the tutorial video on creating blog in 20 min. until i got this error in using the scaffolding feature. I can create, edit, delete my database entries but in bottom of the page there is this error that says:

Fatal error: Call to a member function close() on a non-object in C:\wamp\www\CodeIgniter_1.6.1\system\codeigniter\CodeIgniter.php on line 263


anyone who can please help me trace my fault?

thanks