Les Reed’s side were always second best to the Coca-Cola League Two outfit, who progressed following a fine strike from Jermaine Easter 10 minutes before the break.
The Addicks and their head coach were jeered off at the final whistle, with prospects for top-flight survival in 2007 looking bleak following a bitterly cold evening at The Valley.
Charlton enjoyed a spell of possession, but were unable to make the most of their dominance and the Chairboys grew in confidence.
Suddenly it was all Wycombe, and skipper Tommy Mooney smashed in a close-range volley following a deep cross from the left which was, fortunately for Charlton, straight at Carson. In the 35th minute, Diawara gave away possession, and Moody was straight onto the loose ball to knock it forwards.
Easter spun away from Jonathan Fortune 25 yards out and set himself before unleashing a fierce drive low past Carson.
Sections of The Valley were soon chanting “you are not fit to wear the shirt” – and singing the name of ex-West Ham boss Alan Pardew, linked with a return to the club he played for.
The opening exchanges in the second half were scrappy.
The tension of the crowd was feeding through to the Charlton players. Time and again a hopeful chip was sent through for Bent to chase, but more often than not the England man’s touch was too heavy.
The struggling Addicks were unable to find a way back into the match as the Chairboys marched into the semi-finals.
CHARLTON: Carson, Sankofa (Hasselbaink 74), Fortune, Diawara, Traore, Rommedahl, Faye (Holland 69), Hughes, Thomas (Sam 70), Marcus Bent, Darren Bent.
WYCOMBE: Young, Martin, Antwi, Williamson, O’Halloran, Betsy, Grant (Palmer 63), Bloomfield, Oakes, Easter, Mooney (Stonebridge 87).
Ref: M Clattenburg
Coca-Cola Football League One: Northampton 0 Leyton Orient 1
FA Carlsberg Trophy, first round: Barrow 2 Worcester 5
Spanish Primera Liga
Valencia 3 Mallorca 1; Athletic Bilbao 0 Real Zaragoza 0.