Don't give up! Every child has their own pace and learn differently. I would try adding hooked on phonics to their daily routine. My eldest son started with the Glenn Doman method and YBCR and I noticed he lost interest in it for a bit then would become interested in it again. Then we bought hooked on phonics to help with phonics portion along with Little Reader and now he is decoding the words on Little Reader! Sometimes sight reading doesn't work alone with some children and other children can just get it without the help of extra phonics. They all have different ways of learning. Definitely add some more phonics in and you will see a difference. If they are young, all you have to do is play the DVDs through out the day and they will be able to grasp it. Do not stop the sight reading! The extra phonics will help them get interested in it again.