I have no problems with my MX Revolution, I use it to fire all my Paladin's abilities.

  1. In the software (mouse button settings) select '9 Document Flip'.
  2. Add Wow to the Select programs list. Select it and Change Document Flip to Multiple Keystrokes.
  3. Lastly add the keystrokes you want to map to (the ones you have set to turn your alts).

I have also done this with Octopus in addition to Wow (probably to allow mapping in Octopus, can't remember).