Im setting up two direct tv boxes in one room for 2 tvs. The original box is hd and has a SWM adapter, the satellite lnb only has 1 place to hook up the cable to the box. (Lnb SL3S4NR2-14). So i got another Lnb (SL3K4NRO-02) that has 4 hook ups for the cable. But when i do that the original box gives me a 775 error, but the other direct tv box works fine on other TV. Is there another way to do it. Thanks.