He said: "It's a slow process at the moment but we're trying to build and get new players in. Getting an influence on the team is difficult because I can only bring in out-of-contract players.
"I could go into the loan market but I don't want to go down that road because I think we've suffered in the past from having too many loan players.
"We had 19 last year and that was not helpful. If I sign a loan player they've got to come in to play, not just be here to beef the squad up."