1/2 Limit, 2nd nuts, raise?

[Jehaim]

PokerStars 1/2 Omaha/8 (10 handed) converter

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img]. Hero posts a blind of $1.
<font color="#666666">5 folds</font>, MP3 calls, Hero (poster) checks, <font color="#666666">1 fold</font>, SB completes, BB checks.

Flop: (4 SB) T[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, MP3 folds, <font color="#CC3333">Hero raises</font>, SB calls, BB calls.

Turn: (5 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, BB folds, <font color="#CC3333">Hero raises</font>, SB calls.

River: (9 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Final Pot: 9 BB

Results in white below: <font color="#FFFFFF">
Hero has As Ah 5s 4c (High: three of a kind, aces).
SB has Qh 9h Jd Kd (High: straight, ace high).
Outcome: SB wins 9 BB. </font>

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Trying to learn this game. Bare with me. [img]/images/graemlins/tongue.gif[/img]

Should I raise on flop and/or turn with the 2nd nuts? Or just call?

Would it be ok in a Pot Limit 08-game to lose all your chips on this 2nd nuts hand?