Another AK hand, check raised on turn, check to me on river...

Was the river bet okay? I really had no clue what to make of it after he check raised me on the turn. Opponent wasn't too good, I thought K6 might be a possibility, along with pretty much any other King so I thought a value bet was in order.

Party Poker 2/4 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP1 with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, MP3 calls, <font color="#666666">4 folds</font>, UTG+1 calls.

Flop: (7.50 SB) 4[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, MP3 folds, UTG+1 calls.

Turn: (4.75 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG+1 raises</font>, Hero calls.

River: (8.75 BB) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero ?

Final Pot: 10.75 BB