Couple of things, some already touched on...
1...Anemone's host the clowns, clowns do not host the anemone. I know its trivial, but its a pet peeve of mine.
2...Anemone's are probably one of the hardest things to keep in an aquarium. They definately do not need to be in a tank that is less than 6 months old at an absolute minimum, with 1 year being preferred. The rational behind this is that a new tank has swings in water parameters that can be harmful to anemone's and other delicate inverts. Anemone's seem to have a more difficult time acclimating to captivity than many other things in our systems. Putting them into an environment that has swings in parameters doesnt help them at all. The store you bought it from should have told you that...
You're anemone may very well decide to wander around "looking" for a better environment. This puts it in danger of being sucked into pump intakes or powerheads....
What kind of lights do you have over your tank, what kind of water movement do you have going on, (flow provided by what, and how many?), and how long has your tank been running?
3...As Burning 2nd pointed out, the clowns will decide if and when they decide to bond with the anemone. And there really isnt much you can do about it except be patient.BTA's arent the natural host for Percula or Ocellaris clowns, and I suspect your Caramel Clowns are designer colored Ocellaris from ORA or someone like them.
Click on the link in my signature about Anemone's. That will take you to the RF resource library where there are articles about anemones....you will find lots of information there about yours.
Nick