I want to relace a 2 way hall light switch with a 2 gang switch so that i can add a wall light. the existing switch box has a red-to com blue-to L 1 and yellow-to L2. the new switch metal has two switches and the new ligh has also red blue and yellow. i can get the existing light working ok but have had no luck with wiring up yhe new wall light, can any body help!