I just tested mine and it worked fine (I reinstalled it from the distribution I sent to Bill).
Make sure the doctrine files are installed. All three of the Missleskim54e doctrines must be installed.
Also, make sure you have set the weapon to enable within 11nm of the target, and watch the weapon.
I should have added in the readme, it is best to try this one in a test mission with truth on before going to war with it, as it can be tricky to use.
Also, to be sure, the correct command to use when ranging the missle is "seeker range", in-game, this is the point when the supersonic second stage will launch, with a max range of 11nm. If you use the "destruct range" as the enable point, then it will definately destroy itself.
Trust us, it works.
And if it doesn't after you have tried my suggestions, then I will do whatever it takes to get it to work for you. I have to go out for a bit, but I will check later.