Clownfish not eating...

[JDigital]

I added a ocellaris clown to my tank 3-4 days ago, and the first time when I added food, it ate with no problems, the past 2 nights, it hasn't ate a single bite of food..

I have been feeding frozen brine shrimp w/ crushed flake food added the past 2 nights thinking that it just didn't like the brine, but that hasn't worked.

It also sticks to one end of the tank, and from the limited time I have seen, has not ventured elsewhere in the tank (atleast not when the lights are on). My pygmy angel on the other hand eats with NO problems.

What can I do? The clown is small, so I am worried about starvation.

Help!