NL200 - 2 Pair

[Nibster]

I've played about 20 hands on this table so far. Villian seems like a decent player. I have him at 15.5/13/6 after 70 hands. I have a very tight image, took down two pots with CB's.

Is the checkraise okay here? If so, how much should I raise?

Full Tilt Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $266.45
BB: $200
UTG: $120.85
<font color="black">Hero (MP): $209.75</font>
CO: $200
BTN: $156.65

<font color="black">Preflop:</font> Hero is dealt T[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (6 Players)
UTG folds, <font color="red">Hero raises to $7</font>, CO calls $7, 3 folds

<font color="black">Flop:</font> ($17) A[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $12</font>, CO calls $12

<font color="black">Turn:</font> ($41) T[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $26.70</font>, Hero ?