Carlisle United secured a dramatic victory despite a disjointed and disappointing performance, which had left their place in the competition hanging in the balance at the hands of stubborn conference south opponents Boreham Wood.
An evening of misplaced passes and mounting on and off field frustration for the Cumbrians, handed Boreham the opportunity to claim a huge scalp as they exploited the tension and the gaps, but Mark Beck’s 90th-minute winner broke their hearts.
Lowly Boreham, who sit 74 places below their illustrious opponents, came out of the blocks at pace as they capitalised on the nervous edge which emanated from the sparsely populated terraces.
Howls of annoyance accompanied a slick corner routine from the visitors as Cox dummied a low pass from Montgomery. Callum Reynolds was next in the queue but Thirlwell did well to block the powerful shot.
More neat play in the United half from Moli and Garrard left Montgomery with a clear run into the area and he wheeled away in disgust as he opted for precision with his shot. Fleming was beaten and relieved to see it skip past his upright. The Cumbrians settled and they should have scored on the quarter hour when Robson whipped a lovely cross into the box. Pascal Chimbonda steamed in from deep but his run was blocked.
The visitors soaked up the pressure and they started to enjoy things once more as they played their football in the opposition half. Moli dragged one wide as he made a gap and the unthinkable happened moments later when Amoo lost out to a flick header from Cox in midfield.
Garrard ran into the area and the referee had no hesitation in pointing to the spot as Chimbonda jumped in and hacked him to the ground. The big midfielder picked himself up, dusted himself down and stroked the spot kick into the back of the net.
Carlisle went close at the start of the second half when a corner from a deflected Robson free-kick was recovered by Amoo. Russell punched his inswinger away and it needed a clearance off the line as Noble controlled and flicked it at the bottom corner.
The territory and the possession belonged to the Cumbrians, but they were made to wait for their equaliser when Lee Miller marked his return to action with an expert header, before Beck won it for his side at the death.