Set the persistence in message level :

                SET OutputRoot.Properties.ExpirationTime=600;
SET OutputRoot.MQMD.Expiry = -1; --Non expiry message
SET OutputRoot.MQMD.Expiry = 1; -- expiry message
SET OutputRoot.MQMD.Persistence = 0; --Non peristent
SET OutputRoot.MQMD.Persistence = 1; --peristent