ActiveMQ Temp Percent Usage Issue

Hello everyone-

I know that similar questions to this have been posted before, but I am
unable to find a resolution to my problem so I was hoping that I could ask
again:

I am using ActiveMQ version 5.5.1

I am sending in non-persistant messages to activeMQ, but when my temporary
storage is filled to 100%, the queue stops accepting new messages.

Purging the queue does not clear the memory, neither does setting the TTL
of my messages.

Any help would be appreciated.