How use diferents page themeplates

hello, I am using bbpress in my theme, I have diferents page themeplates, full-width, left-widget-colum…

when I load the bbpress forum in a page, i select the full-width, and it works fine, but, when click in a sub-forum, it load the default page themplate (“left-widget-colum”)

This is the link of the page wher the forum is:

http://s454230239.mialojamiento.es/rideanddrift/?page_id=16

This load in full width

and when I click in the subforum, it redirect to:

http://s454230239.mialojamiento.es/rideanddrift/?forum=test

And this width the widget bar

How can I modify this?

Thanks