Well, I'd say your first "mistake" was installing a pirated (read: stolen) jail break tweak. Try actually buying an installing the REAL Forecast tweak and see if that helps you get rid of the old "broken" tweak.
That's all I can think of to aid you as we won't help you [any more] here. This forum does not condone or help pirates. Not only is piracy, and any discussion thereof, against this forum's rules, it's theft and thus illegal.