Hmm,
I'm a newbie so this is a consumer diagnosis...

Is the pump running?
is there water in the chlorinator...?
does the water exit the chlorinator...?
if you put a puck in the pool skimmer basket, does it disolve...?

assuming the pool is chemically balanced, then either chlorinator isn't getting water flow or smething is "wrong" with the pucks

just my opinion, I'm sure you could get a real diagnosis from someone with stature....