Messages sent by Spring JmsTemplate not being received by normal JCSMP subscriber

I am able to successfully send and receive topic messages via Spring JMS but the messages are not being received by a normal Topic subscriber.

My jms code for sending and receiving is below:

  @Autowired
    private JmsTemplate jmsTemplate;


    public void run(String... strings) throws Exception {


        for( int i = 0 ; i < 100; i++) {
        String msg = "Hello World" + i;
        jmsTemplate.setPubSubDomain(true);
        //jmsTemplate.setdu
        logger.info("============= Sending " + msg);
       this.jmsTemplate.convertAndSend("abc/topic2", msg);

        Thread.sleep(1000);
        }
    }
}

@Component
static class MessageHandler {

    private static final Logger logger = LoggerFactory.getLogger(MessageHandler.class);


    @JmsListener(destination = "abc/topic2", containerFactory = "cFactory", concurrency = "2")
    public void processMsg(Message<?> msg) {
    // Works fine, no issues. 
        StringBuffer msgAsStr = new StringBuffer("============= Received \nHeaders:");
        MessageHeaders hdrs = msg.getHeaders();
        msgAsStr.append("\nUUID: "+hdrs.getId());
        msgAsStr.append("\nTimestamp: "+hdrs.getTimestamp());
        Iterator<String> keyIter = hdrs.keySet().iterator();
        while (keyIter.hasNext()) {
            String key = keyIter.next();
            msgAsStr.append("\n"+key+": "+hdrs.get(key));
        }
        msgAsStr.append("\nPayload: "+msg.getPayload());
        logger.info(msgAsStr.toString());
    }

 public CachingConnectionFactory producerCachingConnectionFactory() throws Exception {
    CachingConnectionFactory ccf = new CachingConnectionFactory(connectionFactory());
    ccf.setSessionCacheSize(1);

    return ccf;
}


@Bean
public JmsTemplate jmsTemplate() throws Exception {

    // CachingConnectionFactory ccf = new CachingConnectionFactory(cf);
    JmsTemplate jsmTemplate = new JmsTemplate(producerCachingConnectionFactory() );
    jsmTemplate.setPubSubDomain(true);
    jsmTemplate.setDeliveryPersistent(false); // tried both true and false. 

    //jsmTemplate.setSessionTransacted(true); // I get an exception ... isnt supported with Direct transport.
    return jsmTemplate;
}

@Bean
public ConnectionFactory connectionFactory() throws Exception {

    Hashtable<String, Object> env = new Hashtable<>();


    env.put(InitialContext.PROVIDER_URL, jndiProviderURL);
    env.put(Context.SECURITY_PRINCIPAL, username);
    env.put(Context.SECURITY_CREDENTIALS, password);
       System.setProperty("java.security.krb5.conf", KRB5_LOC);
    System.setProperty("java.security.auth.login.config", JAAS_LOC);
    env.put(SupportedProperty.SOLACE_JMS_AUTHENTICATION_SCHEME, 
   SupportedProperty.AUTHENTICATION_SCHEME_GSS_KRB);
    env.put(SupportedProperty.SOLACE_JMS_KRB_SERVICE_NAME, "HOST");
    env.put(SupportedProperty.SOLACE_JMS_VPN, vpn);
    env.put(SupportedProperty.SOLACE_JMS_DYNAMIC_DURABLES, false);
            env.put(SupportedProperty.SOLACE_JMS_DELIVER_TO_ONE_OVERRIDE , false);
          SolConnectionFactory cf = SolJmsUtility.createConnectionFactory(env );
    return cf;

}

@Bean
public DefaultJmsListenerContainerFactory cFactory(ConnectionFactory connectionFactory, DemoErrorHandler errorHandler) {
    DefaultJmsListenerContainerFactory factory = new DefaultJmsListenerContainerFactory();
    factory.setConnectionFactory(connectionFactory);
    factory.setErrorHandler(errorHandler);
    factory.setPubSubDomain(true);
    factory.setSubscriptionDurable(false);
    return factory;
}

I wonder if you can spot some obvious issue here please?

Many Thanks,
Ali