Ampthill Town were unbeaten in four home games last month but they were second best to AFC Dunstable who beat them 6-0 on Saturday.
The visitors scored three goals in each half to record their third win over Town this term and hand Town their 10th home league defeat.
Town opted to give a first outing to Josh Porr-Shakespeare in goal but it was a debut he will want to put behind him, while Brandon Carney was on top form with four goals for the Creasey Park side.
Dunstable took a 10th minute lead when Carney beat Town’s offside trap and planted the ball past the advancing Porr-Shakespeare.
James Bishop increased the advantage with a cross-shot which eluded the keeper and found the top corner of the net, before a Carney header just after the half hour mark put Dunstable firmly in the driving seat.
Carney’s fourth just after the interval increased Town’s woe and, although substitute keeper Jordan McKechnie replaced the luckless youngster, Dunstable hit Town for six with Jermaine Hall and Carney scoring in quick succession late in the game.
After their unbeaten run of four matches, the loss to AFC made it two successive defeats against clubs in the top-three.
They head to in-form Berkhamsted on Saturday.