Ian Holloway said the dressing room was "as flat as a pancake" after the home defeat against Fulham.
"We had a great start and got ahead but were then hit with two of the best goals I have seen against one of my sides for a long time and they really knocked the stuffing out of us. Then just after half time we go and let in two goals from corners. It was pretty awful from our point of view after that.
"The lads are devastated but it is how we react and we now move on to the weekend and a game against Arsenal."
The gaffer admitted that he saw things in his sides performance that were uncharacteristic from his lads.
"It is very difficult in this league because it is all about fine margins at this level. If it isn’t going for you then you just have to keep going and make sure you get what you want. Tonight I saw a few of my players drop their shoulders and that is not like a Palace side and wasn’t good to see. We are in the best league in the world playing against the best players so let’s not miss out on this opportunity.
"We have lost five games since we announced the 25 man-squad and there is something wrong there, I don't think we have got the same spirit, maybe we changed too many, but that is the squad we have until January so they better buck up and stick together.
"In life it is not about the event that gets you down it is about your response equals the outcome and I will be looking for exactly that from the lads."
The assembled media asked the boss about his post match meeting with the chairman, Steve Parish, that they were reporting on social media was taking place before he made his way up to the press conference.
"We talk all time, I'm not going to talk about what we just spoke about to be perfectly honest. I'm not talking about my future at the football club, I'm talking about the football club and that is all I have ever done."