mysql master-slave replication

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MySQL-Connector

Hi
I have one small issue in mysql. I created a master-slave replication in mysql.Master and slave databases are hosted in two servers.I am using two client machines to connect with master and slave.My issue is like when am trying to update or insert master from client machine1 that replication is happening in slave but when am trying to do same from clientmachine2 replication not working. The issue is only for client machine 2 .whatever manipulation am trying to do from client machine2 is not replicating in slave

pls help
thanks