Catching them may be working against you, as it frightens them. You need to lure them in with treats if at all possible.
Many people keep them closed in the coop for several days when first put outside, to teach them this is home now. This might work for you even at this stage. I would try it at least for two nights and one day, myself. I'd probably turn the light off when I do it, assuming it gets good daylight in there.
Many people keep them closed in the coop for several days when first put outside, to teach them this is home now. This might work for you even at this stage. I would try it at least for two nights and one day, myself. I'd probably turn the light off when I do it, assuming it gets good daylight in there.