Milan chairman Silvio Berlusconi has criticised Barcelona for holding out for too much money for Ronaldinho.
The Brazilian is set to leave Camp Nou after a disappointing season and Milan are keen to bring him in this summer.
Ronaldinho is also understood to want to join the Italian giants but the two clubs have yet to agree on a price.
Berlusconi insists that Milan will continue to negotiate with Barcelona but has urged the Catalans to come to a compromise.
"We still want him and we know he wants to come to Milan but Barcelona have asked for a sum we all consider excessive," Berlusconi told Radio Radio.
"We are still looking to recruit him, however."
Media reports in Italy suggest that Barcelona are only prepared to sell Ronaldinho for 30million euros (£24million), while Milan only want to part with 16million euros (£12.8million).
A possible deal has been complicated by the fact that Milan are also interested in Barcelona full-back Gianluca Zambrotta.
A number of other clubs, including Internazionale and Manchester City, have been linked with Ronaldinho.