Enable Steelseries World of Warcraft Mouse. Enabling this cvar enables functionality to easily bind/map all buttons on the mouse in-game.
Changing this setting
In-game, type the following
/console enableWowMouse setting
Alternatively, you can exit wow, open the Config.wtf file, and add the following line:
SET enableWowMouse setting
Patch 3.3.0 (2009-12-08): Added
List of references, usually from Blizz employees