The Dons were desperately unlucky to crash out 2-1 in the FA Cup second-round grudge match at stadium:mk on Sunday afternoon.
They pulled level through Jack Midson's flying header after Stephen Gleeson had given Milton Keynes the lead, only to be sent spinning out by Jon Otsemebor's deft injury-time flick.
But Ardley can quickly turn his attentions to the league with the Dons, currently one point above the drop zone, travelling to rock-bottom Barnet next weekend.
"I just want to get into training now and focus on what we have ahead," he said.
"I know that Barnet is a big game, but they are all big games now. We know what we have to do.
"They were sorry players in the dressing room afterwards, their heads were down, but that's football and we must use that hurt to strive on and change our performances in the league."