Game doesn't work when Built

When I run the game in Unity, it works just fine. However, when I run build it, then run it, it doesn't.

What should happen is: Log in. Receive data about area around player Generate said area around player.

However, when I use the built version, instead of generating or receiving, it does nothing, until I click on my log out button, at which point it receives all the data and generates the terrain.

This is also strange, because once the logout button is pressed, the game stops receiving and parsing data from the server.

Any ideas?