My limit break doesn't Work

Ok so when trying to use the Caster limit break in a party, both bars all the way full... Nothing happens, I have literally spammed the limit break action out of frustration and it just doesn't work and I don't know why. I've used the caster limit break just fine during beta so I know how it works. Not sure What the hell the deal is. Any help would be greatly appreciated, It is pretty irritating to me that It doesn't work while everyone else seems to be able to use it just fine.