Packaged game will not open

Hi. I have been trying to use a game packaged for development in UE 4.5 on Windows 8. My game contains a plug-in and was made using blueprints so in order to be able to package it, I used the option Add code to project and I build the solution using Visual Studio. After that I packaged my project for Windows (64-bit). Everything works fine and the engine is capable of packaging the project; however, when I try to open the application nothing happens, for a moment the computer starts loading but, after a few seconds,the loading symbol disappears and nothing is displayed, not even an error.

This is the first time I tried packaging a game with a plug-in so maybe I am doing something wrong. I have packaged other projects without plugins and everything works fine. I would really appreciate your help.