Base rw Model dw-2200 dvd player?

Question

Can't set it up? I am going through set top box through dvd player to tv and can only get the time on the dvd player. Tv and set top work beautifully,alone ..what am I doing wrong that the dvd won't show on the tv? I think I have tried everything. Yellow white and red out STB to In DVD out dvd to in TV av 2 Same with RF aerial ..but nothing on the screen Please help! PS I am not savvy with the back of tv's etc thanks Sue