This hand really bothers me 4/8nl

[TheCleverOne]

I have really hard times quessing my opponents hand in this one.

6 max 4 8nl in prima, I limp UTG+1 with K [img]/images/graemlins/diamond.gif[/img] 3 [img]/images/graemlins/diamond.gif[/img]
with $4900 after UTG has limped with $1100.
Folded to BB($500) who checks.
Flop comes KQ3 suits not important. My opponent who is normal max 6 player, solid winner who is capable of doing some moves, betss $24 utg folds and I miniraise to $48. BB calls. Turn 9 check and I bet $87.48(dont ask [img]/images/graemlins/laugh.gif[/img] ) opponent calls. River 4 my opponent bets $216....
What is my move?

My image in this point, as usual is loose and I have showed all kind of crazy bluffs. But I have avoided making big bluffs against this player, because he is good, and showing bluffs only works against fishes.


What is my action on river and what did my opponent have?