Do I need to fold here?

[PokerBob]

i have been losing a great deal lately, and it is messing with my head. villain here is 49/9/1.5, but i haven't played with him.

Party Poker 3/6 Hold'em (6 max, 4 handed) converter

Preflop: Hero is SB with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, Button calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, Button calls.

Flop: (5 SB) 9[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, Button calls.

Turn: (3.50 BB) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, Button calls.

River: (5.50 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, Hero?????????