Messages not getting deleted on the queue

Hello All,
Iam a new user of OpenJMS.Offlate iam having an issue with using it.
I sent some  5000 messages to the queue and left them in the queue for more than 24 hours.
when i try to retrieve all the messages from the queue,iam not seeing them getting deleted[Iam seeing the messages in the queue using admin console].
But when i restart openJMS,than iam able to see messages getting deleted.[Again iam using the admin console for this].
 
The above problem disappears if i try to retrieve messages as soon as i put them onto the queue.
 
Iam not setting any explicit message properties like timetolive,expiry time etc.All being used are the default ones.
 
Can anybody help me in this regard???
 
Thanks
Suman
 
 

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