Message consumer closing due to error in listening thread & Also message is not delete from the queue.

Hi,
I have a process which puts a message on a queue and then reading message from queue and insert in DB. When it inserted to DB, it tries to close the
queue, which it does successfully, but I quickly get:
16:19:26,429 WARN [SpyMessageConsumer] Message consumer closing due to error in listening thread.
javax.jms.IllegalStateException: The session is closed
at org.jboss.mq.SpySession.checkClosed(SpySession.java:1149)
at org.jboss.mq.SpySession.doAcknowledge(SpySession.java:175)
at org.jboss.mq.SpyMessage.doAcknowledge(SpyMessage.java:353)
at org.jboss.mq.SpyMessageConsumer.run(SpyMessageConsumer.java:704)
at java.lang.Thread.run(Thread.java:595)

When I close the queue, I do a

finally
{
if(qConnection!=null){
try

{ qConnection.close(); }

catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

What am I doing wrong, if anything?

When I reading message from queue.I will Redelivered same Message.
also message is not delete from the queue.

16 Nov 09 16:42:34,663]Thread specific :: Received Message: org.jboss.mq.SpyObjectMessage {
Header {
jmsDestination : QUEUE.Open_NMS_Evnet_Queue
jmsDeliveryMode : 2
jmsExpiration : 0
jmsPriority : 4
jmsMessageID : ID:2-12583698243211
jmsTimeStamp : 1258369824321
jmsCorrelationID: null
jmsReplyTo : null
jmsType : null
jmsRedelivered : true
jmsProperties :

{JMSXDeliveryCount=252, JMS_JBOSS_REDELIVERY_COUNT=251}

jmsPropReadWrite: false
msgReadOnly : true
producerClientId: ID:2
}
}

I am awaiting your reply.
Please Quick response

Thanks & Regards
Jay Prakash