Create sub cat under Documents

[Genzai]

I'm having no luck in creating new categories under the "Documents" category. On doing

admin>catalog>catalog/products>documents

I have the option to add new products but not add a new category.

Any answers? Thx

[Genzai]

Found out what it was.

Document folder already contained example products, and this does not permit the addition of subcategories.

[Ajeh]

Thanks for post the solution ...

The NEW PRODUCT and NEW CATEGORY buttons do vanish when the current Category contains one or the other ...