Billy Davies has admitted he is yet to achieve everything he set out to as manager of Nottingham Forest.
Davies replaced Alex McLeish as Forest boss on Thursday, 20 months after he had been sacked from the post.
"I've said to the fans for a long time we had unfinished business," the 48-year-old told BBC East Midlands Today.
"I'm delighted to be back, and very much I'm looking forward to trying to achieve what we didn't do last time we were here."
Davies, who was sacked by the club's previous owners, becomes the fourth manager to work under the Al Hasawi family since they took over at the City Ground in July.
And after McLeish's departure by mutual consent, Davies was re-instated as Forest boss by the club's Kuwaiti owners.
"I'm not here to play at it. The owners are serious with regards to what they want to do," Davies continued.
"Their ambition is absolutely clear. They've already brought in 14 players, which should answer lots of questions."
And Davies believes that everyone at the club needs to work together in order to bring about the owner's vision of Premier League football at the City Ground.
"In my meeting with the chairman, I can see clearly he is a winner," he added. "In the chairman's meeting with myself, I'm sure he can see I'm also a winner, and together we want to win.
"[I want fans to] get behind the club, get behind the chairman and get behind the people that own the football club. Get behind what starts now as a great challenge to take this club to the Premier League."
Forest chairman Fawaz Al Hasawi added that he felt that in Davies, the club had a manager that knew the Championship inside-out.
"Billy Davies is one of the best managers," Al Hasawi said. "He took us to the play-offs twice, Derby to the Premier League and Preston to the play-offs twice."
"He knows the league very well and he's very familiar with the club. We bought the club in July and we hired different managers, but finally we have Billy Davies.
"And now I hope we achieve what we want to achieve."