They will roost when they are ready, and not a day sooner.It looks familiar because you've seen it on another thread where I was asking for suggestions on how to get my birds to roost.
I've tried moving it a bit more off the wall, I've tried turning it on an angle, I even moved it to the middle of the floor , nothing worked! As suggested I even tried to set them on the roost one by one, after dark, that didn't work either so I just gave up!