user access in custom module - anonymous access denied

I am building a custom module for a client but I am not able to get anonymous users to access the custom pages. Instead it is giving the following message:
Access denied
You are not authorized to access this page.

I have the following code in my .module file:

function fixtures_perm() {
 return array('access fixtures content');
}

In my menu hook I have the following code:

  $items['pickyourproducts'] = array(
  'title' => '',
  'description' => 'Loads Pick Your Products form for the fixtures module.',
  'page callback' => 'pickyourproducts_page',
  'access callback' => 'user_access',
  'access arguements' => array('access fixtures content'),
  'type' => MENU_CALLBACK,
  'file' => 'pickyourproducts.module',
  'file path' => drupal_get_path('module', 'pickyourproducts'),
);

I have checked all the permissions in the permissions page for "access fixtures content".

Could anyone help me with this issue???