Issue with bbpress

I created a main “category” type, parent a “forum” type to it and when user post to the “forum” type, it lead to a “topic” type page.

I use widget logic plugin to show widget to the sidebar. I have a issue here, using is_single(), the widget show on both wordpress single post page and “topic” type single page, what logic should i use to show only on the “topic” type single page?

http://wordpress.org/extend/plugins/widget-logic/