Connecting Dish Tailgater Using Existing cable-in hookup

[TrishS]

Hello, I've been trying to figure this out for awhile. We have a Dish Tailgater that works great in the MH when connected directly to the satellite receiver. Problem is this means we have to run the coax thru a window. Connecting the coax to the existing cable-in on the outside of the MH doesn't work. Is there a way to utilize the existing cable-in outlet so that the signal gets to the receiver? Everything I've tried doesn't work. Thanks