Manager Ollie frustrated by goals conceded in 3-1 lossMillwall boss Ian Holloway says his squad need to gain some belief after Birmingham came away from The Den with a 3-1 victory on Tuesday night.
Lee Clark's men led 2-0 at half-time thanks to goals from Clayton Donaldson and David Cotterill but The Lions rallied in the second-half - halving the deficit thanks to Lee Gregory's first for the club - only for sub Wes Thomas to seal Birmingham's win late on.
"We've got to stop defending like that," Ollie said. "We've got to stop one long ball getting hit over our head and them scoring. They've had four shots and scored three.
"At the minute these mistakes, as a group, are costing us. There are certain things that have happened recently that have shocked everybody and wobbled them. We have to gain some belief and solace out of each other.
"You can't keep letting goals in when you're attacking people. That has to be dealt with.
"We are all frustrated because before the break we had 10 points out of 15 and were on that wonderful roll. In every one of those games we looked like we could compete."
He added: "We don't seem to be scoring as easy goals as other people are. These long balls are doing us a bit so I'm going to have to look at it. It's about lots and lots of practise and hopefully we will stop that. We need to do it quickly.
"There are a lot of games left for us to keep fighting and to show that we can compete at this level.
"The strength of this club is its unity and the way people work. I think you saw that in the second-half.
"The positives for me were that nobody folded. We had a terrible spell where we go in at half-time two-nil down. We managed to get ourselves back in it and I expected to get something then.
"I thought the crowd were great and I think they loved the fact that Aiden (O'Brien) came on. It was great for (Lee) Gregory to get his goal and (Mathias) Ranegie started to show what he could do for us. (Richard) Chaplow did excellently as well."