Cheltenham won for the first time in four Sky Bet League Two outings with a 4-1 win over 10-man Colchester.Town goalkeeper Scott Flinders denied Frankie Kent before Colchester took a 40th-minute lead when Kurtis Guthrie held off Joe Morrell and scored with a superb 25-yard shot, despite Flinders' best efforts to keep it out.But Colchester were reduced to 10 men three minutes later when winger Kyel Reid was dismissed after lashing out at Morrell, prior to a Colchester free-kick.And Cheltenham equalised just before the hour mark when former Colchester attacker Sanmi Odelusi bundled home from close range after Mohamed Eisa's low drive had been kept out.Cheltenham went ahead with 20 minutes remaining through Nigel Atangana, who converted after Tom Eastman had failed to cut out Jerell Sellars' drive from the left.It was 4-1 with 11 minutes remaining when Sellars drove a low shot under Sam Walker and in from Kevin Dawson's pass.And Eisa wrapped up Cheltenham's win five minutes later when he slotted home clinically, from Carl Winchester's pass.