I think Bravo17 hit the nail on the head. Try setting up mysql to accept external connections...here's a little tip to help.
mysql username = b3user
mysql password = b3pass
b3 database = b3_db
Enter the mysql code:
GRANT ALL PRIVILEGES ON b3_db TO 'b3user'@'%' IDENTIFIED BY 'b3pass' WITH GRANT OPTION;
Just change the username, password and database to the ones that already exists.