Alan Hutton claims his first team exile is about finances rather than football, reports the Birmingham Mail. Hutton has not been selected for a matchday squad since Lambert's first friendly in charge and has been forced to train with the kids.
Hutton is just 12 months into the four-year contract he signed last summer and is believed to be earning more than £30,000 per week.
"At the time I was told it was nothing to do with my ability," said the Scotland international. "It was all about the other aspect of it.
"If that's the case I don't see why I won't be considered for the team. I'm still on the books, so there's no reason to leave me out altogether.
"Myself and the new manager get on fine, there is no problem between us whatsoever. I've actually had really good conversations with him since he's taken over.
Hopefully, now the window is closed and no more deals can be done, I'll push my way back in.
"It's frustrating, of course it is.
"As a footballer it's probably the worst situation to be in, sitting not getting the chance to play.
"It's hard to take, but the only thing I can do is keep working hard and show him if needed I'm ready.
"It's all about not giving up and doing all I can to get back in the fold at Villa."