Without seeing it, I would have to say bad wiring, or you might have
overheated the pins on the switch and melted something.
I've not rewired any of my newer
Ibanez guitars, so I don't know how
much plastic is in the switch that could get damaged from to much heat.
Just recheck all your wiring!
You can also make sure you have the correct pickup coils working by
flipping the 5 way switch and tapping on the pickup pole pieces with
an
allen wrench.