How to import Model and Replace AXuitl in AX2012?

I would like to import a new model and replace the existing related models.

In Command PROMT I used:

cd"C:\Program Files\Microsoft Dynamics AX\60\ManagementUtilities"
axutil import /file:"c:\MyModel.axmodel" /server MySQLInstance /database MAPEI_AX63_MYDATABASE_model /replace:MyOLD_Model /conflict:push

I get some errore about Database Instance ; I think is wrong position.

Please, could you help me.

Thanks