help...how would you play this hand?

[nwaddell]

playing .5/1 limit HE on party. i'm primarly a NLHE Tourney player. i'm sitting on the button with K/7 o/s. 4 callers, no raise PF. flop=rag, K, K. checked to me, i bet. raise by MP, folds to me, reraise by me, everyone folds except MP. call by MP. Turn=rag. bet by MP, raise by me, reraise by MP, call by me. now, i guess my problem is that i have tunnel vision. my thinking went along the lines of "i have one K, two more are out there, there is a low pobability of someone having the other." ok, how would you play this? turns out he had KQ, and beat my 7 kicker with his Q. any help on getting out of this tunnel vision problem i have would be appreciated. let the ripping begin...