お門違いですよ。

お門違いですよ。

Don't put the saddle on the wrong horse.

お門違(かどちが)いですよ。

Okadochigai desu yo.

御門違い (おかどちがい)

barking up the wrong tree; calling at the wrong house

です (です)

be; is

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

Readings: モン、かど、と

Meanings: gate, counter for cannons

Readings: イ、ちが.う、ちが.い、ちが.える、 -ちが.える、たが.う、たが.える

Meanings: difference, differ