A late equaliser from Simeon Jackson stretched Barnet's dismal run without a victory to 11 matches.
Jackson had a goal ruled out for offside but just 12 seconds into the second-half Michael Leary powered home an unstoppable 25-yard drive.
Andy Barcham broke free to lift over Rob Beckwith for the equaliser, but two minutes later John O'Flynn rose to head home a pin-point Nicky Deverdics cross.
But deep into stoppage time, Jackson bundled in from close range.
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