Associated Items issue

Hello,

I am using the buddy press docs plugin in my website. there is an issue in the plugin that when we add any associated item or category for docs. And associate a doc with this category so associated category is not visible in the front end. and there is no option or drop down for all categories of the docs. If any user enter any doc from front end so there is should be a drop down for all categories to choose the category of the doc. But there is no option.

Is I missing something for this please let me know how we can accomplish this from front end or can visible all the docs according to the associated items.
or tell me what is the use of this associated items.

Please it is very urgent.