My item won't submit on themeforest

Hello. i can’t figure out why i can’t submit item to the themeforest. I think i made everything by kipping in mind the rules. I have created four files: cover image, main file zip with theme files include. Preview image zip file with images and thumbnail file.Once i upload, after several hours in my dashboard there is no queued for review message any more and i can still upload one item. Can’t find out reason. Can anyone help