Have you tried the other coax jack (adjacent to the phone jack) in the bay? One should be the park input and the other is for a satellite dish that sets out on the ground if you have one... As I recall the park cable input on my2007 ws the one closest to teh phone jack connection.
Then when you have the park cable going to the right input in the bay, the other end is in the electronics cabinet inside our coach -- usually on the Wineguard amplifier switch plate. Don't forget the little box from the RV park also needs to have its own power. It also takes a while (several minutes) for the box to handshake with the cable plant back at the cable service source.
2007 Tour Master T40C
Acura MDX toad
"It takes a great deal of time to recover from any improvement..."