Custom taxonomy terms does not showing in admin.

Hi all, i have a problem:

I use wp_insert_term to add new terms into my custom taxonony via code. The problem is that those terms does not show up into taxonomy admin table; however, they are created into wp_terms.

Adding terms works only if I add them via form.

I found this solution delete_option("{$taxonomy}_children");, but this time all terms are not children ( of course, i tried and it didn’t work )