KENNY Jackett said he had been left "hurt, frustrated and disappointed" by Millwall's heartbreaking defeat to Blackpool on Saturday.
Nathan Delfouneso's stoppage-time winner sealed a smash-and-grab victory for the Tangerines in a game the Lions had been controlling for the first hour.
James Henry's goal direct from a corner had given the visitors a deserved lead and they were still on top when Thomas Ince equalised against the run of play.
And so Millwall were stunned when Delfouneso scored at the death to send them back to South London empty-handed and reeling from a fourth consecutive loss in the Championship.
Jackett said: "I'm very frustrated and I am disappointed defensively with both of the goals we have conceded. It hurts. It hurts the players and myself as the manager.
"We've lost four on the spin and whatever the ins and outs of each of those games, there is a line there and that's winning or losing. We've lost those games.
"It's a black and white situation and we've been losing. We have to do something about that. Over a period of maybe ten games we've given away too may goals and not kept enough clean sheets
"Zeroes and ones against are what earn you points and we've given two goals away today. On any one occasion, sides can have two shots and score two goals but we haven't had zeroes enough.
"I felt that going forward we created more clear-cut chances than we have done in a while, without putting them away. We hit the bar twice and the 'keeper made a good save from Rob Hulse.
"It was tough for us to get a decision from the referee and the linesmen, throughout the game, but that's how it is for us away from home.
"We were ahead as the away side and were playing on the counter-attack, we weren't getting small decisions from the referee so you know people are going to come onto you.
"You have to sustain those periods of pressure, you have to come through them and ensure you do not concede. We didn't do that.
"Going forward there were opportunities for us in a spell where, generally, there haven't been. We need to continue to make those type of chances."
Despite the disappointment of the result, Jackett was pleased by his new strikeforce of Hulse and Benik Afobe, who was thrown into the starting line-up 24 hours after his loan move from Arsenal.
"The two new lads were a handful and brought a little bit to the team," he said. "For Benik, he has to step down for the cup game next week because he's cup tied.
"They both had good games and I am sure will add something during the run-in and the vital last few months of the season."