So the button works fine but only when I'm tabbed out of a game or click off it. Is it possible to do the binding even when in game

Settings > Global Hotkeys

Works most of the time.

Make sure Global Hotkey's is turned on

Global Hotkeys. Make sure you're aware of the fact of Global Hotkeys, just to be sure. It works, guaranteed 100%

;) 8)

Global Hotkeys.

Thank you all, I have seen the light

The Light would be using WSplit instead of Livesplit ;)

[quote] The Light would be using WSplit instead of Livesplit [/quote]

nice meme

#livesplitmasterrace

Side note: Global Hotkeys might not work if the game has some form of overlay eg Steam or Games for Windows, in which case you have to launch Livesplit in administrator mode.