YOU SAID:

i knew you where trouble when you walked in

INTO JAPANESE

私はあなたが入ったときにどこに問題があるか知っていました

BACK INTO ENGLISH

I knew where the problem was when you entered

INTO JAPANESE

あなたが入ったとき、私は問題がどこにあるかを知っていました

BACK INTO ENGLISH

I knew where the problem was when you entered