Luton first-team coach Sam Ellis was delighted to see his side's Carling Cup run continue as they claimed a 3-1 extra-time win over Championship high-fliers Charlton.
The Hatters had beaten Premier League Sunderland in the second round, before coming from behind to beat the Addicks last night.
Dean Sinclair put Charlton ahead inside four minutes only for Hatters midfielder Steve Robinson to volley a superb equaliser before half-time.
Matthew Spring then headed home in the 104th minute, and substitute Drew Talbot wrapped it up with three minutes of extra-time remaining.
Now Ellis has challenged his side to translate their form into success at Coca-Cola League One level.
Ellis said: 'We're delighted with the character we showed.
'We just need to turn this into a bit of league form now. We've beaten Sunderland and Charlton but we've got to focus on our next two games - which are Huddersfield and Yeovil.
'We'd like to think that the players have set themselves a standard now and we are all here to get promotion, which we stand a good chance of doing if we play like that.'
Opposite number Alan Pardew admitted the pressure of an instant return to the Premier League led him to make 10 changes to his side.
Pardew said: 'There are some financial rewards to be had, but no one is going to remember if you get knocked out of the quarter-finals of the Carling Cup but finish eighth in the league.'
Cardiff boss Dave Jones hailed veterans Robbie Fowler and Jimmy Floyd Hasselbaink, after they combined to send West Brom to a 4-2 defeat at The Hawthorns.
Fowler, with a double, Hasselbaink and fellow veteran Trevor Sinclair were all on target in the opening 30 minutes to end Albion's 100% home record who gained some consolation through an Ishmael Miller double.
He said: 'I have said all along that once the two of them get fitter they will score goals at this level.
'They scored at the top, so they can certainly score at this level.'
Baggies boss Tony Mowbray was stunned, saying: 'I don't feel let down. It is a process you have to go through. '
Sammy McIlroy admitted Morecambe were outclassed by Sheffield United, who beat his League Two side 5-0 at Bramall Lane.
Billy Sharp and Luton Shelton both scored twice, with Lee Hendrie grabbing the other, as Morecambe crashed out - after beating Preston and Wolves in previous rounds.
'They were class,' McIlroy admitted.
'Every mistake we made was punished, and their quality really shone through. The difference in class was too much for us to handle, especially the finishing.'
In the final game of the night not involving Premier League sides, Blackpool claimed a 2-1 extra-time win over Southend at Bloomfield Road.
After the match, Seasiders boss Simon Grayson revealed Michael Jackson had predicted his goal that sent them into the last 16 for the first time in 34 years.