Breeding Problems in Australia

[banyanboys]

I have 2 lutinos, male about 9yrs female about 3yrs, they have breed once last year with the mother abandonign the chick after 5weeks, i raised him and he is fine. BUT now they are breeding again (Yeah) 4 eggs layed, 1 hatched 3 days later baby gone?!?!?! no other egss hatched. i took out the eggs, looked at them with a torch and chucked them out. Now she is on 2 eggs again but the same story. What should i do???