Overcall hand or leaving money on the table.?

Button is 15/12/1.3 BB is 31/21/1.5 who I have isloation raised and crushed in the last three hands in a row.
Should I have beeen raising here?
Party Poker 2/4 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is UTG with A[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises</font>, UTG+1 calls, UTG+2 calls, <font color="#666666">1 fold</font>, MP2 calls, <font color="#666666">2 folds</font>, <font color="#CC3333">Button 3-bets</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">BB caps</font>, Hero calls, UTG+1 calls, UTG+2 calls, MP2 calls, Button calls.

Flop: (24.50 SB) T[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls, UTG+1 folds, UTG+2 calls, MP2 calls, Button calls.

Turn: (14.75 BB) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls, UTG+2 calls, MP2 folds, Button calls.

River: (18.75 BB) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
BB calls $1 (All-In), <font color="#CC3333">Hero bets</font>, UTG+2 folds, Button calls.

Final Pot: 21 BB