(22) I have no idea what to do here

[golfcchs]

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (10 handed) FTR converter on zerodivide.cx

MP1 (t540)
MP2 (t875)
MP3 (t775)
CO (t700)
Button (t653)
SB (t995)
BB (t590)
Hero (t715)
UTG+1 (t1040)
UTG+2 (t1117)

Preflop: Hero is UTG with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">Hero raises to t100</font>, <font color="#666666">1 fold</font>, UTG+2 calls t100, MP1 calls t100, <font color="#666666">6 folds</font>.

Flop: (t345) 4[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero all in t 615

What do you think of this play? I really dont like this spot out of position with 2 other players, but what do I do? Check folding here seems too weak tight on rag board, and any continue bet essentially commits me. Thoughts apperciated.