Main Menu Options Don't Work -Help

Hi, I created a simple main menu with some options like textures, shadows and etc…
In my editor for example, when I click on textures High option, and then on textures Low options the level changes based on the options i’ve selected. But in my packaged game it doesn’t change, the only way it changes is by loading another level… Can someone explain to me why? or how can I fix it? Thanks in advance!