Need help for multiboxing!

It's been a while since I played WoW, maybe 8 months ago was the last time I logged in.
I'm using Octopus Multibox software to play with my shammies.
I still have the same save profile in all of them and same setting in my Octopus.
I'm using Octopus 1.3.8
I only have 1 computer and I'm only running two clients.

My problem is, why is the mouse click (right/left) not working on my slave window.
And yes I have the key and click broadcast enabled.
And no, I don't use toggle mouse click on option, never used it before, not gonna use it now.
And yes, I have the same camera angle and camera distance on both main and slave window.
And yes, I tried running 64bit WoW and 32bit WoW, both not giving me any result.

Anyone could help me?
Greatly appreciated.

There's an option in there Client tab -> WoWhook -> Inject WoWhook DLL on launch; try those options and see if it helps. There are also some "Cyclic click options" that may need to be tweaked depending on your computer's speed/capability.