Do I cap this suited ace preflop?

[hornsandspurs]

I used to always limp with suited aces (A9 and below) but I am trying to get more aggressive. My like my first raise, but should I have capped? I think I should have. I so, please explain. Thanks.

Party Poker 1/2 Hold'em (9 max, 8 handed) FTR converter on zerodivide.cx

Preflop: Hero is Button with 8[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, MP1 calls, MP2 calls, CO calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">UTG+1 3-bets</font>, MP1 calls, MP2 folds, CO calls, Hero calls.

Flop: (14.50 SB) 4[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">UTG+1 bets</font>, MP1 calls, CO calls, <font color="#CC3333">Hero raises</font>, UTG+1 calls, MP1 calls, CO calls.

Turn: (11.25 BB) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+1 checks, MP1 checks, CO checks, <font color="#CC3333">Hero bets</font>, UTG+1 folds, MP1 calls, CO folds.

River: (13.25 BB) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero bets</font>, MP1 calls.

Final Pot: 15.25 BB