[albert_dao]

I don't mean to whip out really poor advice here, but here's a bit of a take from another perspective:

I introduced my BTA's and RBTA's to my tank when it was only a month or so old (keeping in mind all my rock was cured) and they did fine. Hell, they even cloned at an alarming rate.

Also, I spent a whole 15 minutes acclimating them (I was in a hurry).

Lastly, I've even had to tear one of these things in half to save it from the powerhead -- I ended up with two anemones there perfectly healthy

Anyway, my point here is that these anemones are really tough and more likely then not, you probably got a poorly shipped specimen (as Tony said).