I'm new to drupal, so forgive me if my question will be silly :) 
I've a little problem with my first custom content on a drupal 6 installation. My content "biography" is listed in admin/content/types page, but when i click on my type, page reloaded instead of loading /admin/content/node-type/biography

If i force the url in the browser, i'll be redirect to /admin/content/types page again.

Do you know why? I've implemented both the node_info and form hooks, but with no luck. 

Thank you in advance and sorry for my english! Have a nice day!