Kean has, however, accepted defeat in his efforts to attract David Beckham on loan.
Ronaldinho, 30, is back in Brazil and ready to complete a move from AC Milan but Kean said: "No it's not over, as far as I'm aware that hasn't happened. It seems to have gone back on and gone a little bit more positive in the last 24 hours rather than negative which is encouraging.
"I'm trying to get the player to commit to come over and speak to us and then to deal with his club. We are trying to get a formula that first of all satisfies his current club and then see if the player is actually fully committed to coming here."
On Beckham, Kean added: "That one has gone quiet. I don't think he's going to be coming to the north west so that rules us out."