breeding albino and lutino fischer African love birds

Hello friends, I am victorgrant from Columbia =. I bought some albino and lutino fischer chicks for breeding. I kept them in a big flight cage.they selected their own pairs and I separated the pairs in a individual cage. I fed them, foxtail millet, canary seed, big millet, stripped Sunflower seeds, safflower seeds, lin seed, nigerseed, boiled egg mixed with bread powder, beetroot, carrot, sprouted seeds like moong dal.i give supplements like vimeral (vitamin) ,ostovet ( calcium)syrups. I deworm them once in 6 months. I have 10 pair albino and lutino fischer paired. My problem is egg is not getting fertile. Some pair don't sit on eggs. .i am totally depressed. Please help me friends. What should I do . here my friends fear of keeping this albino and lutino fischer because of not getting chicks from them.

Waiting for all your valuable replies
Thanks!

I didn't find the right solution from the Internet.

reference:
birdsplanet.com/forum/565456
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