granting access to mysql

[rs51]

i have two networked WinXp machines.
let's say machine called 'father' has java and mysql installed
now i need 'son' machine to have permission to access, from a java app, mysql in father machine.
how can i grant the accesses?
thanks in advance

 

[rs51]

SOLVED:
mysql> grant all on *.* to root@123.456.7.890 identified by '*****';