Actias luna don't want to mate

For last 4 days I can't breed luna moths. I'm a bit surprised because 2 weeks ago Actias selene were doing really fine, all - 3 females mated (now I still have got few, but don't have males). I kept them in a cage 40x40x40cm, in the cellar. However luna males are completely not interested in females. What's the mistake?? The cage? Of course I'm doing everything what I can do for them - males are far away from females; there are only 2 females in the cage and 4 males. What's wrong?? Do You have any tips for breeding this moths?