Is this a "bad beat" or just poor playing ?

[mstram]

Full Tilt Poker, NL Hold'em Tournament, 30/60 Blinds, 8 Players
LeggoPoker.com - Hand History Converter

Hero (UTG): 3,620
UTG+1: 1,185
MP1: 2,030
MP2: 1,170
CO: 1,315
BTN: 690
SB: 8,570
BB: 1,305

Pre-Flop: (90) 6[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to 120</font>, 5 folds, <font color="red">SB raises to 180</font>, BB folds, <font color="red">Hero raises to 240</font>, SB calls 60

Flop: (540) 5[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets 540</font>, Hero calls 540

Turn: (1,620) 6[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">SB bets 1,620</font>, <font color="red">Hero raises to 2,840 and is All-In</font>, SB calls 1,220

River: (7,300) A[img]/images/graemlins/diamond.gif[/img] (2 Players - 1 is All-In)

Results: 7,300 Pot
Hero showed 6[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (a full house, Sixes full of Aces) and LOST (-3,620 NET)
SB showed 3[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img] (a full house, Aces full of Fives) and WON 7,300 (+3,680 NET)