can't update my listing

I am trying to udate my listing to suggest a more appropriate catagory. Every time I type in the site title at the bottom of the page where is ask for it, it tells me that the site isn't listed in the directory. Some one please give advice.

Check again, I think it should be asking for the site URL

In the box below, please type in the URL exactly as it is listed in this category. Click on the submit button, and you'll be prompted for additional information.