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Gills boss Peter Taylor blamed a slow start for his side's defeat by Oldham on Saturday.
They mustered only one shot on target in 90 minutes and were beaten by Mike Petrasso's second-half header.
Gillingham were booed off following the defeat which leaves them 16th in League 1.
Taylor said: "I'm just frustrated with them (the players) really because I think we're not showing what we're capable of.
"We just seem to be losing a little confidence too quickly.
"If everything starts right we have a good afternoon.
"Sometimes if somebody makes a little mistake it might affect their performance so we've got to be a little bit stronger than that.
"They kept going and working as hard as they possibly could but unfortunately we couldn't break them down.
"You've got to want the ball and you've got to have a plan in your head to go and create something."
Gills have struggled for goals all season at Priestfield and Taylor, whose team host Stevenage on Tuesday, added: "The players aren't showing as much confidence as I'd like at home.
"It's not the fans' fault. I think the fans have been outstanding - the majority, anyway - and I think it's just nerves at home.
"You don't want to let your club and your team down."