Win64-Shpping version not working in steam

Hi!

Have published several games via steam no problem, now normally packaged newest game unreal 4.10 version. It comes and packaged as usual and win64-shipping version not working unless remove that win64-shipping for game name so that it is only game.exe then upload it to steam but there isn’t working because it error that win64-shipping. missing. Hope someone can say that why not working unless remove that win64-shipping in steam