I'm trying to learn Drupal 6. I want to register the path '/topic' to a MENU_CALLBACK using hook_menu(). Here's what I have:

function mymodule_menu() {
   $items = array()
   $items['foo'] = array( 
       'page callback' => 'show_page_foo',
       'access callback'   => 'user_access',
       'access arguements' => array('access foo content'),
       'type'     => MENU_CALLBACK 
     );
}
function show_page_foo() {
   //show foo page
}

This works fine for a logged in user. But when I visit the path as an anonymous user it shows 'Access Denied' message. What must be the 'access callback' and 'access arguments' values to have this accessible to all visitors?

I remember I made this work by simply saying 'access' => TRUE in Drupal 5. No longer works in Drupal 6.