There is an options underneath Social I think in the Carbonite options. I can't give you exact instructions since I don't use Carbonite anymore (memory whore) but I know there's an options to do it.
Open Carbonites' options (type "/carb options" in chat, right click the Carbonite minimap button and choose "Options" in the menu, right click a non-icon area of any Carbonite map and choose "Options" in the menu) and go to the "Social and Punks" page. UNcheck the "Use enhanced social window" option.