How do I use the strider controller?

i downloaded a mod to control striders recently for garrys mod http://www.garrysmod.org/downloads/?a=view&id=21066 and the control menu appears in options>player like this pic, http://s3.garrysmod.org/img/dl/21066_1.jpg but how do i get it to work. iv spawned a strider and clicked on select strider but nothing happens what can i do.

The Strider Control is Broken,Also, the Fixed one is also broken. Its due to the commands it uses for it to select the strider and blocked, so technically its not broken, its just the commands are blocked