Karl Robinson admitted MK Dons’ squad isn’t good enough after the 1-0 defeat at home to Carlisle.
In a dour performance against the Cumbrians, which saw Dons lose their unbeaten home record after Lewis Guy’s 34th minute volley, the manager felt there was no inspiration in the side, contributing to the loss.
And he has pinpointed the need for a new change.
He said: “We need a new defender in quick, I just told the players inside.
“I think we need it immediately. We need somebody. We should have Stephen and Shaun on Saturday, but you can’t keep losing these players.
“It looked like a team just thrown on the pitch. They have to take more responsibility. We didn’t stand up.
“It wasn’t a shambles like at Stevenage. We just didn’t have that spark, inspiration.
“For 25 minutes, we dominated the game, we had a few guilt-edged chances which we missed.
“Then they scored, and we reverted to a paused way of playing. We were slow, we passed around the back four too much.
“We came across too slow, our wide players narrowed off and didn’t allow us to play our game. In the last 15 minutes, it wasn’t good enough.
“But maybe it shows us that our squad isn’t good enough. That’s the big thing for me. I thought it might have been. Players didn’t step up to the plate.”
Robinson was without keeper David Martin, suspended Shaun Williams and injured Stephen Gleeson from Saturday’s 3-2 win over Rotherham,
He said: “Parts of that we know weren’t acceptable, but what do you expect when we’re without David Martin, Antony Kay, Stephen Gleeson, Shaun Williams, Dean Bowditch? That’s five of our starting 11.
“In the second half we didn’t even create a chance and that’s not good enough. On a dour night, there was no inspiration from anyone. We didn’t hit the ground running.
“I feel for the players a bit though, because without five key players. But I cant keep pulling rabbits out of the hat.
“The only bit of light in the second half was the lightning.”
And Robinson admitted that his triple substitution after 53 minutes was a mistake, but in fact made the team look predictable.
He said: “I made a mistake with the three substitutions - I thought it would have galvanised them, the fans and players, and we reverted to 4-4-2, which people have been calling out for, and we looked predictable.
“It’s not acceptable, and we need to step up and be counted.”