Ready to go live, but helpers won't load! [SOLVED]

[eluser]CoderReborn[/eluser]
Thanks everyone!
Problem solved.

Here's a summary of my changes:

1) autoload.php changes

$autoload['helper'] = array('model_helper', 'my_array_helper', 'my_string_helper', 'my_cookie_helper', 'my_form_helper', 'url', 'form', 'string', 'date', 'cookie');

2) config.php changes

$config['subclass_prefix'] = 'my_';

3) I changed the public Linux (Ubuntu) permissions for these files to "r-x"