Dagenham & Redbridge earned a surprise win over Leyton Orient to reach the area quarter-finals of the Johnstone's Paint Trophy.
Orient should have gone ahead inside 90 seconds when John Melligan was free but fired into the side-netting.
At the other end, Ben Strevens shot against a post for the visitors in a closely fought local derby.
Strevens then grabbed the winner when he found the found the top corner of the net with a cross-cum-shot.
Leyton Orient: Morris, Terry, Saah, Oji, Palmer, Melligan (Daniels 46), Chambers (Purches 46), Demetriou, Corden, Gray (Echanomi 70), Ibehre.
Subs Not Used: Nelson, Mkandawire.
Dag & Red: Roberts, Huke, Boardman, Smith, Griffiths, Taiwo (Graham 57), Southam, Rainford, Sloma, Taylor (Moore 71), Strevens.
Subs Not Used: Thompson, Okuonghae, Green.
Goals: Strevens 74.
Ref: Fred Graham (Essex).