If your clowns were aquacultured it might take a while longer being they never seen an anemone before you introduced them. Although they went in the anemone in the bucket, they were probably just looking for a place to hide and the only thing there, was the anemone. Give them time and have patience.
How big are the anemones compared to the clowns? How long are the clowns in the tank? What kind of lighting?(need T5 or Mh) -How big is the tank and how long is it set up?