After an awe-inspiring run to lift the topflight title last season, the Flying Antelopes have been identified for the wrong reasons in the ongoing campaign.
But Madu said that, after they had a meeting, the players of the Nigerian champions are keen on changing their fortunes.
“It was a bad experience we had in Zambia but I won’t like to reveal them here. The manner in which we were eliminated was very disgraceful," Madu told Goal.
"But we have resolved within ourselves to do everything possible to ensure that we return to our best starting from the tie with Kano Pillars on Sunday.
"We have put our past behind us and are ready to put Rangers’ name in the front burner for the right reasons again."
Rangers are rooted to the bottom of the log with 13 points from 14 games with five outstanding fixtures, including the Sunday's tie with Kano Pillars.