Weird river raise I made with TPTK on a horrible board

[baronzeus]

Opponents are OK, both slightly loose preflop. Thoughts? I'm not too happy with it in retrospect


Party Poker Hold'em (9 handed) converter

Preflop: Hero is MP3 with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, SB calls, BB calls.

Flop: (6 SB) 4[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, Hero calls, SB calls.

Turn: (4.50 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, BB checks, Hero checks.

River: (4.50 BB) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>