Andy Morrell believes Jay Harris's disciplinary problems have prevented the Wrexham midfielder from playing at a higher level.
Harris was sent-off for the second time this season after picking up a second yellow card in the FA Trophy loss at Luton.
The 26-year-old has been dismissed four times in two seasons with Wrexham.
"Personally I don't think he's playing higher up because he's got that reputation," Morrell said.
"He's got the ability to play way higher but because he gets sent-off he misses half his season.
"He missed two more games for us and he's been missing for five I think already. It's a third of our season.
"I'll speak to him over the next week."
Player-manager Morrell said Wrexham exited the FA Trophy "with a whimper" and promised changes ahead of Saturday's game at Welling.
Mark Cullen's header gave Luton a first half lead before Neil Ashton's own goal completed a miserable afternoon for last season's FA Trophy winners.
"It was a chance for us to play on a nice pitch in front of a good crowd and go and show what we're all about," Morrell added.
"We'd turned the corner I thought but that was more like two and a half months ago.
"We seem to play well against some teams and then we can't produce it and get that consistency.
"But that was not good enough - I told them that. They know that and hopefully we've got to get it right by next Saturday."