"Colin has a job to do and that's to get us promotion and we hope he achieves that. We'll review that in the summer," he told BBC Radio Nottingham.
"We've been searching for absolutely ages to have some continuity throughout the club.
"It's unfair to make any predictions at this moment.
"We are in fourth, we have a game in hand on the team in second and the next 18 matches are going to be very telling."