I have the same site in 2 servers, both the same configuration but one it's not working at all.
The page: [url removed, login to view] , click at the link were it says: "optimized pheromones" in red.
Also on the [url removed, login to view] the effect is not working.
Check this site and you will see how it should work correctly:
[url removed, login to view] (also check the home page)
Any question, let me know. It should be something very simple but I can't figure it out...