APACHE ACTIVEMQ RESOURCE ADAPTER

I need help in trying to make out why activemq is not deploying properly.
I'm getting below error on server start up.

14:15:03,804 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 54) MSC000001: Failed to start service jboss.deployment.unit."soar.war".component.QueueListner.START: org.jboss.msc.service.StartException in service jboss.deployment.unit."soar.war".component.QueueListner.START: java.lang.RuntimeException: javax.resource.spi.InvalidPropertyException: Invalid settings: acknowledgeMode must be set to: Auto-acknowledge or Dups-ok-acknowledge.
at org.jboss.as.ee.component.ComponentStartService$1.run(ComponentStartService.java:57) [jboss-as-ee-7.4.0.Final-redhat-19.jar:7.4.0.Final-redhat-19]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [rt.jar:1.8.0_112]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [rt.jar:1.8.0_112]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_112]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_112]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_112]
at org.jboss.threads.JBossThread.run(JBossThread.java:122)
Caused by: java.lang.RuntimeException: javax.resource.spi.InvalidPropertyException: Invalid settings: acknowledgeMode must be set to: Auto-acknowledge or Dups-ok-acknowledge.
at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponent.activate(MessageDrivenComponent.java:206)
at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponent.start(MessageDrivenComponent.java:178)
at org.jboss.as.ee.component.ComponentStartService$1.run(ComponentStartService.java:54) [jboss-as-ee-7.4.0.Final-redhat-19.jar:7.4.0.Final-redhat-19]
... 6 more
Caused by: javax.resource.spi.InvalidPropertyException: Invalid settings: acknowledgeMode must be set to: Auto-acknowledge or Dups-ok-acknowledge.
at org.apache.activemq.ra.ActiveMQActivationSpec.validate(ActiveMQActivationSpec.java:136)
at org.jboss.jca.core.rar.EndpointImpl.activate(EndpointImpl.java:184)
at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponent.activate(MessageDrivenComponent.java:204)
... 8 more

Below is the standalone configuration.

    
            
                
                    activemq-rar-5.7.0.rar
                
                XATransaction
                
                    default
                
                
                    default
                
                
                    tcp://host:port
                
                
                    
                        
                            1
                            20
                            false
                            false
                        
                        
                    
                
                
                    
                        
                            com.assets.v1.queue
                        
                                            
                
                        
        
    

MDB configuration.

MDB deployed in war.

@MessageDriven( activationConfig = {

@ActivationConfigProperty(propertyName="destinationType", propertyValue="javax.jms.Queue"),

@ActivationConfigProperty(propertyName="destination", propertyValue="com.assets.v1.queue"),

@ActivationConfigProperty(propertyName="acknowledgeMode", propertyValue="Auto-acknowledge"),

})

@ResourceAdapter("activemq-rar-5.7.0.rar")

Awaiting response. Thanks!