Are the roost poles sufficient diameter. They should be 2 inches or larger. I use natural tree branches in my coop. There are sections that are less than 2 inches as well. The bark is on the branches. I filed smooth any protruding knots.
At dusk, just take a few of them and place on roost. Next day place a few more. Some may develop a liking to the roosts on their own after trying it out.
WISHING YOU BEST and