$33: blind battle line check

[AllinDan]

Assume no reads, and that I haven't played any hands of consequence. How's my line up to the river and do I call his river bet?

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (9 handed) converter

Hero (t800)
UTG (t750)
UTG+1 (t1555)
MP1 (t975)
MP2 (t555)
MP3 (t755)
CO (t740)
Button (t1190)
SB (t680)

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">7 folds</font>, SB completes, Hero checks.

Flop: (t60) 4[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t45</font>, SB calls t45.

Turn: (t150) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets t30</font>, Hero calls t30.

River: (t210) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets t100</font>, Hero calls t100.

Final Pot: t410