How is posible disable the LOAD_BALANCE?

 Hello, I am configuring TAF in our RAC. I have a problem. I want configure FAILOVER but I want not LOAD_BALANCE. I have configured the listener.ora, tnsnames.ora and the parameter remote_listener. The failover is running perfectly but the connections are balancing (first one node, after the other node).  I think that the problem is the configuración of tnsnames.ora. I show you the tnsnames.ora.

TAF_CASTOR.INVXXXXX.COM =
(DESCRIPTION =
    (ADDRESS_LIST =
    (FAILOVER=ON)
    (LOAD_BALANCE = OFF)
      (ADDRESS = (PROTOCOL = TCP)(HOST = cxxxxx-vxx)(PORT = 1527))
      (ADDRESS = (PROTOCOL = TCP)(HOST = exxxx-vxx)(PORT = 1527))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = BBACK)