Are you feeding the anemone? Try krill, or if it won't accept that, try Formula VHP. Usually they'll go for that right away. You can try changing a bunch of water to get your nitrate/phosphate levels down, but this sounds more like a food and or habitat problem. Is the anemone firmly attached to a rock or crevice?

Also, you said you had two. Did one split or did you buy two? If you bought two, and they were not from the same colony, (I assume these are the colonial E quadricolor) maybe they were fighting.

HTH
Matt