I can`t open .exe file after building the game for Windows 64 bit

Hello to everybody!

There is one problem that I cant solve now... Im using Unite 3.4.0f5 and even created there something like my first game level (just Moon landscape with some objects on the terrain and lightning with ‘walking’ camera), but I found that I cant built an .exe file ("PC and Mac Standalone" options in "Build Settings" window). Actually, I can save my level into .exe file for Windows 64 bit (creating .exe for Windows 32 bit is finishing faillure "Could not preload global game manager #0", but its not too terrible because Im using Windows 7 64 bit), but I cant open it after saving! Im clicking on the .exe file with my game and its just not opening, even in “Task Manager”. How can I solve this problem?
P.S. If you need some more data about it, I can add it later. Please, I need your help, Unity masters.

Unity is not a 64bit program. I beleive that 32bit programs cannot create 64bit ones. Check all your scripts for errors or typos.