Jacques Maghoma scored twice while Calvin Zola and Billy Kee both netted as the Brewers made the most of Fleetwood keeper Scott Davies' red card.
He said: "I'm ecstatic. It was an excellent performance.
"It was a difficult pitch to play on, there wasn't a lot of football to be played.
"At half time we just thought we had a little more to give. Then the penalty and the sending off changes the game.
"If you look at our best performances this season they've been hard working and committed and I'm not ashamed to say those are qualities I admire.
"Any successful side has that in their toolbox. That's something we've got to keep doing."