Message Dequeue count in jconsole 0 even after messages are recieved and consumed by subscribers

Hi,
I have producer which constantly is sending messages to the topic and i can
see that messages are enqueued in the topic and dispatched also and i see
that there are subscribers which are receiving messages. The problem is that
the dequeue count in jconsole is still shown as zero even though the
subscribers are receiving messages.

Has anybody faced a similar problem before? Please help me, I am really
stuck on this.

Thanks,
Abhi