Zinv not working

I am trying to get the mod to work, but it won't  spawn anything and it wont open the editor. I have already tried disableing all other mods, but that didn't help. When I try to start up the invasion, nothing happens and I get this message.

[Zombie/NPC Invasion (Fixed)] lua/autorun/client/tool.lua:28: Calling net.Start with unpooled message name! [http://goo.gl/qcx0y]
  1. Start - [C]:-1
   2. OnChange - lua/autorun/client/tool.lua:28
    3. OnChange - lua/vgui/dcheckbox.lua:83
     4. SetValue - lua/vgui/dcheckbox.lua:30
      5. Toggle - lua/vgui/dcheckbox.lua:46
       6. DoClick - lua/vgui/dcheckbox.lua:39
        7. unknown - lua/vgui/dlabel.lua:232

If I try to open the editor, this is the message I get.

[Zombie/NPC Invasion (Fixed)] lua/autorun/client/tool.lua:139: attempt to index global 'SPAWN_MENU' (a nil value)
  1. DoClick - lua/autorun/client/tool.lua:139
   2. unknown - lua/vgui/dlabel.lua:232