Calling an object

[eluser]AbyJaby[/eluser]

Code:

Fatal error: Call to a member function list_fields() on a non-object in E:\xampp\htdocs\CodeIgniter\system\helpers\functions_helper.php on line 27

How should i create an object. Pls help.

[eluser]InsiteFX[/eluser]
If you want help it helps to show your code!