MILLWALL were left "baffled" by their 1-0 loss to Blackpool on Tuesday but Lee Martin insists the players will not allow their heads to drop.
The Lions spurned several guilt-edged chances at Bloomfield Road and were punished for their profligacy when Ricardo Fuller headed the only goal of the game.
But Martin says the dressing-room atmosphere will remain upbeat ahead of Saturday's vital south London derby with Charlton.
"Frustrating is the word to describe that game," he said. "When you don't take your chances, sometimes it just happens like that.
"The boys dug in and tried to play the right way on a dry, bobbly pitch, but it didn't come off for us. We had enough of the ball but we couldn't break them down.
"We are baffled as to how we've lost 1-0.
"We are bitterly disappointed but we have again showed that we are playing the right way, so we've got to lick our wounds and go again."
The winger added: "There is a real togetherness in the ground – and I am not just saying that because I have to. The boys are really, really pulling together.
"We have gone from a massive high at Derby to a massive low but that will be forgotten by Saturday because we've got a massive game against Charlton.
"We can't get carried away with disappointment – we've got to bounce back and be positive.
"We're bitterly disappointed for the fans and for everyone involved but what I can't stress enough is how hard we're working to correct things.
"Sometimes you can be the better team and lose and it racks your brain, but that is just football and it will continue to happen throughout the leagues.
"All we can say is that we're sorry for the result and we are trying to turn it around."