In future, put the stake etc in your thread title, it'll stop you getting trolled.
http://forumserver.twoplustwo.com/58...hread-1309359/
As for the hand, ATo plays fine as a flat or a 3bet(somewhat of a mixed strat), so I guess 3betting is ok, although Id perhaps flat this early until we know slightly more about villain and his tendencies.
Flop probably plays better as a check, but now that we've bet vrs this sizing probably doing anything other than folding is ok.