[HELP] How to Share 1 Mysql Database to two computers please help thanks

I Tried to Grant the ip address and use flush privileges of this computer and also tried to turn off the firewall but it still doesn't work can somebody help me with this im using mysql and this it the error that come up

Run-time error '-2147467259(80004005)';
[MySQL][ODBC 3.51 Driver]Host' James-PC' is not allowed to connect to this MySQL server

and this the code that i inputed on mysql

mysql> Grant ALL ON *.* to root@'ipaddress' IDENTIFIED BY'root';


Then
mysql> FLUSH PRIVILEGES;

please help me i really need this to work to connect 2 computer on 1 database only