"Under Gerard Houllier our problem was our form at home. It's reversed at the moment," he said after Tuesday's defeat to Olympiakos.
"No-one can really put their finger on why. We couldn't work out our problems at home over the last few years, and now it's the same away.
"We need to sort it out quickly because we've two away games coming up in the Premiership.
"We had a good record away under the last manager because we were solid.
"Maybe we we're tougher in certain areas but now we're better on the eye at home.
"It's all about finding the right balance. We haven't quite got it. We never had it under the last manager at home. That isn't a problem now, it's away where we've got to get it right."