Neil Roberts (pictured) scored the decisive goal of the game in the 71st minute after Willy Gueret weakly punched away Steve Evans' header, the Wrexham captain on hand to chip the ball in from 25 yards.
Rotherham failed to take full advantage after they were held to a 1-1 draw by Wycombe at Millmoor.
Stephen Brogan put the home side ahead in the 14th minute when his 25-yard free-kick deceived the Chairboys defence and flew past goalkeeper Frank Fielding.
League Two
Bradford complete Lee deal
30/06/2008 AT 16:20
Ten minutes into the second half Wycombe equalised with a lucky strike from Scott McGleish, whose cross dipped over Millers goalkeeper Andy Warrington.
Struggling Mansfield remain in the relegation places after they suffered a 1-0 defeat by high-flying Darlington at Field Mill.
Richie Foran converted a 30th-minute penalty after Dan Martin brought down Ian Miller inside the penalty area to give his side victory.
Notts County claimed a 1-0 win over Chester thanks to a 58th-minute strike from defender Adam Tann while Dagenham and Redbridge and Grimsby played out a 0-0 draw at Victoria Road.
Elsewhere, Accrington's clash with Brentford, Peterborough's trip to Barnet and Bury's game against Stockport all fell foul of the weather.
Macclesfield's meeting with Lincoln at Moss Rose and Rochdale's game against Bradford at Spotland were also postponed because of waterlogged pitches.
League Two
Accrington want Liverpool youngster
29/06/2008 AT 16:41
League Two
Shrews get new Sherriff in town
28/06/2008 AT 15:26