ATs vs 3 bet preflop

[ewile]

CO is 36/7/1.3 188 hands
MP3 I had only 15 hands against but he was 30/0 in that short time.
Poker Stars
Limit Holdem Ring game
Limit: $0.50/$1
10 players
Converter

Pre-flop: (10 players) Hero is UTG+2 with A[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/diamond.gif[/img]
UTG folds, UTG+1 calls, <font color="#cc0000">Hero raises</font>, 2 folds, MP3 calls, <font color="#cc0000">CO 3-bets</font>, 4 folds, Hero calls, MP3 calls.

Flop: T[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (11.5SB, 3 players)
Hero checks, MP3 checks, <font color="#cc0000">CO bets</font>, <font color="#cc0000">Hero raises</font>, MP3 calls, <font color="#cc0000">CO 3-bets</font>, Hero calls, MP3 calls.

Turn: 3[img]/images/graemlins/club.gif[/img] (10.25BB, 3 players)
Hero checks, MP3 checks, <font color="#cc0000">CO bets</font>, Hero calls, MP3 calls.

River: 7[img]/images/graemlins/diamond.gif[/img] (13.25BB, 3 players)
Hero checks, <font color="#cc0000">MP3 bets</font>, <font color="#cc0000">CO raises</font>, Hero folds, <font color="#cc0000">MP3 calls all-in $1</font>.

Results:
Final pot: 17.25BB

Heads up I probably would have gone into call down mode against the 3 bet. Here I went for the c/r to try to knock out MP3.

On the river it seemed a clear fold to me.

Anyone approach this differently?