TPTK OOP He just keeps calling!

[Frank C]

should i be slowing down anywhere here for pot control?
villan is 20/0/.4 over 70 hands

Full Tilt No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">CO ($25)</font>
Button ($52.70)
<font color="#C00000">Hero ($24.75)</font>
BB ($20.30)
UTG ($15.20)
MP ($47.95)

Preflop: Hero is SB with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, CO calls $0.25, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $1.35</font>, <font color="#666666">1 fold</font>, CO calls $1.

Flop: ($2.85) 3[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $2</font>, CO calls $2.

Turn: ($6.85) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4.75</font>, CO calls $4.75.

River: ($16.35) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $11</font>, <font color="#CC3333">CO raises to $17 (All-In)</font>, Hero calls $5.75 (All-In).

Final Pot: $49.85