MY_Loader.php doesn't appear to be loading

[eluser]Dave Stewart[/eluser]
Hi All,
I'm hoping I've just missed something obvious, but my custom extended Loader class isn't being fired. I've:

- named it MY_Loader.php
- placed it in application/libraries
- included the call to parent::CI_Loader() in the constructor MY_Loader()
- uploaded the file

Any ideas?

Thanks,
Dave