Dead letter exchange not recieving any message

[Ezcanoor]

so i want to use dlx on my project, the message recieve by first subscriber but when i pass to dlx, my dlx queue not receiving any message. my code shows like this
`
@RabbitSubscribe({
exchange: "be-hub",
routingKey: "accurate-create-do",
queue: "accurate-create-do-queue",
queueOptions: {
// messageTtl: 4000,
deadLetterExchange: "be-hub", //! ini di bikin di config
deadLetterRoutingKey: "dlx-1-key", //! ini di bikin di config
},
// errorHandler: RMQErrorHandler,
})
async createLarkDeliveryOrder()
const flag = false;
console.log("firts queue");
if (!flag) {
console.log("im going to send it to dlx");
return new Nack(false);
}
}

@RabbitSubscribe({
exchange: "be-hub",
routingKey: "dlx-1-key",
queue: "dead-letter-1-queue",
errorHandler: RMQErrorHandler,
})
async createDeliveryOrdeAccurate()
console.log("there we go, popped up on dlx queue");
return new Nack();
}
`

can you guys help me, and tell me what mistakes did i do ?