I don't see the changes from Server A in server B

SERVER A config file:

server-id=1
log-bin="mysql-bin"
binlog-do-db=replicatietest
replicate-do-db=replicatietest
relay-log="mysql-relay-log"
auto-increment-increment = 2
auto-increment-offset = 1

command:

CREATE USER 'replicator'@'%' IDENTIFIED BY 'Slave123';
GRANT REPLICATION SLAVE ON *.* TO 'replicator'@'%' IDENTIFIED BY 'Slave123';
SHOW MASTER STATUS;
       --> mysql-bin.000003 397 replicatietest
STOP SLAVE;
CHANGE MASTER TO MASTER_HOST = 'Server A IP Address', MASTER_USER = 'replicator', MASTER_PASSWORD = 'Slave123', MASTER_LOG_FILE = 'mysql-bin.000003', MASTER_LOG_POS = 397; 
START SLAVE;
      --> OK

Server B config file:

server-id=2
log-bin="mysql-bin"
binlog-do-db=replicatietest
replicate-do-db=replicatietest
relay-log="mysql-relay-log"
auto-increment-increment = 2
auto-increment-offset = 2

commands

CREATE USER 'replicator'@'%' IDENTIFIED BY 'Slave123';
GRANT REPLICATION SLAVE ON *.* TO 'replicator'@'%' IDENTIFIED BY 'Slave123';
SHOW MASTER STATUS;
   --> mysql-bin.000001 154 replicatietest
STOP SLAVE;
CHANGE MASTER TO MASTER_HOST = 'Server B IP Address', MASTER_USER = 'replicator', MASTER_PASSWORD = 'Slave123', MASTER_LOG_FILE = 'mysql-bin.000001', MASTER_LOG_POS = 154; 
START SLAVE;
    --> OK

I can ping the ip adresses. But when I change something in Server A in the replicatietest, I don't see anything in server B.

Server A and B have both the scheme replicatietest.