Northampton failed to end their miserable home form as they were held to a third successive draw at Sixfields - 1-1 by 10-man Port Vale.
Cobblers should have won it after drawing level in the second half but they failed to capitalise on their man advantage and have now gone seven games without a league win.
Northampton created a couple of decent chances in a scrappy first half, with Adebayo Akinfenwa failing to convert Peter Gilbert's cross, while Courtney Herbert saw a shot tipped over by Chris Martin.
The home side missed a glorious opportunity to break the deadlock three minutes before the break when Tommy Fraser brought down Paul Rodgers, but Akinfenwa saw his penalty saved by Martin.
And that miss proved costly two minutes into first-half stoppage-time when former Cobbler Marc Richards scored from the spot after Chris Dunn had brought down Louis Dodds when Dean Beckwith's back-header fell well short.
But Akinfenwa redeemed himself six minutes after the restart when he successfully converted from the penalty spot for his ninth goal of the season. It came after he was pulled back in the box by John McCombe, who was shown a straight red card.
Despite enjoying most of the possession, Northampton failed to snatch the three points, with Gary Mulligan and Billy Mckay unable to finish from good positions.
Dodds almost won it for Vale but he was denied by Dunn, who also saved the rebound from Richards. It took a last-gasp challenge from Lee Collins to deny Mckay in stoppage time.
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