Chambers impressed manager Ray Lewington enough to sign him on a permanent three-year contract in a deal worth up to £250,000. Chambers started regularly in his first season at the club and also featured in the club's run to the League Cup semi-finals that year. He scored his only two career goals to date (as of December 2010) in the 4th round 5–2 victory over Premiership side Southampton. He also played in the quarter-final victory over Portsmouth and semi-final defeat to Liverpool.