Online Magazine Theme

Hi,
I have recently installed bbpress and I am using this theme – http://fthemes.com/onlinemagazine-free-wordpress-theme/ it is installed here -http://chill4uscarers.co.uk/ the theme works well for the front end , but on the forum as shown here http://chill4uscarers.co.uk/forumtest/ it doesn’t as it wants 2 sidebars and I only want to show one that is the bbpress sidebar with the widgets.
I have got installed bbPress WP Tweaks so I really want to know how to make the one of the forums php work with only one sidebar that is only the bbpress one.
Many thanks in advance.
Ross