Codeigniter extend library NOT working. No reason

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\[code\]<?phpclass MY_Form_validation extends CI_Form_validation { function My_Form_validation() { parent::CI_Form_validation(); }} \[/code\]This is the code in the file MY_Form_validation.php that I have created in my CI libraries folder. There were some functions in there but i removed them to try and get to the bottom of this.Utilizing this library extension, form validation simply does not work at all. I have all my form validation rules in a config file. If i delete MY_Form_validation.php everything works perfectly.A post on the CodeIgniter board yielded no results.Perhaps someone here could help?Thanks