The P81 and SNS akiras already have them, I would take a look at them to see if your's are set right. Also, make sure that the emitter is exactly touching the geometry of the model, if it is either inside it or outside the model the weapon wont fire. If everything still doesn't work right, check your aim. The BC targeting system isn't designed to fire broadside, so don't expect the reticle to work, it's hardcoded to direct fore/aft targeting, if you've got a very narrow firing solution it might be difficult to line up your shot well enough for the weapons to fire.