Glad you're OK. The absolute thing to check is that the coupler bolts go into the shafts' grooves both on the box and steering wheel sides. You absolutely have to take these bolts out of the coupling while intalling the latter otherwise it wont fit properly. Also, it's advisable to "open" a bit both sides of the coupling and test slide it on both shafts before assembly. Having it slide freely will ease assembly and avoid the column shaft to retract while trying to force-fit the coupling onto it. Then of course both coupler bolts should be properly tightened.