Early in a $1 tourny kk

[SpuddzMcoy]

I was playing a ferguson tourny on FTP. i was MP and the second hand just started i was dealt KK in MP. One known loose player limped UTG and i raised 3 time the BB(90). The button called the BB called and the Limper called.
the flop was 7 4 9 rainbow and the dude UTG pushed I folded the Button Called and the BB folded. This was a bad play i think.......or was it??? could i get some advice plz
ps i cashed in 61st