rabbitMQ return queue is empty when i trying to get message by using outgoing AMQP from zato

[hend10]

I have a service that is invoked by ESB (zato) the role of this service is to publish a message in rabbitMQ through an AMQP outgoing but when i consult rabbitMQ and make get message the answer is queue is empty.this is service in zato

from zato.server.service import Service

class HelloService(Service):
def handle(self):

    # Request parameters
    msg = 'Hello AMQP broker!'
    out_name = 'My CRM connection'
    exchange = 'My exchange'
    routing_key = ''
    properties = {'app_id': 'ESB'}
    headers = {'X-Foo': 'bar'}

    # Send a message to the broker
    self.outgoing.amqp.send(msg, out_name, exchange, routing_key,
        properties, headers)