JMS & REST Service : target message has an empty body

[Anonymous]

Hi all,
I designed a camel route to implement the following use case :
1. get a xml message from a queue (ActiveMq)
2. process it through a REST webservice to transform and consolidate the initial message into a new xml message
3. forward the REST response to another jms queue
the cLog shows that the message body is allright, but when I look in the queue, the body is void.
Could somebody give me any clue ?
main code :

public void initRoute() throws java.lang.Exception {
	routeBuilder = new org.apache.camel.builder.RouteBuilder() {
		public void configure() throws java.lang.Exception {
			from(uriMap.get("input_queue"))
					.routeId("input_queue")
					.setHeader("AuditStep")
					.constant("XSD Validation")
					.id("cSetHeader_1")
					.id("cTry_1")
					.doTry()
					.setHeader("AuditStep")
					.constant("REST Consolider")
					.id("cSetHeader_2")
					.setHeader("CamelHttpMethod", constant("POST"))
					.setHeader("Content-Type",
							constant("application/xml"))
					.to(uriMap.get("REST Consolider"))
					.id("cHttp_2")
					.log(org.apache.camel.LoggingLevel.INFO,
							"cLog_1", "REST Response : ${body}")
					.id("cLog_1")
					.to(uriMap.get("to_target_JMS"))
					.id("cMessagingEndpoint_1")
					.doCatch(Exception.class)
					.process(new org.apache.camel.Processor() {
						public void process(
								org.apache.camel.Exchange exchange)
								throws Exception {
							exchange.getIn()
												.setHeader(
														"XSD_Validation_error",
														exchange.getProperty("CamelExceptionCaught"));
							System.out
									.println("CamelExceptionCaught : "
											+ exchange
													.getProperty("CamelExceptionCaught"));
						}
					}).id("cProcessor_1").setHeader("AuditStep")
					.constant("REST Consolider - failure").id(
							"cSetHeader_3")
					.to(uriMap.get("cJMS_2")).id("cJMS_2");
			from(uriMap.get("target_JMS")).routeId("target_JMS")
					.to(uriMap.get("output_queue")).id("cJMS_3");
		}
	};
	getCamelContexts().get(0).addRoutes(routeBuilder);
}

working on
ESB Professional Edition
Version: 5.1.3.r96646