My Blackberry 9780 & 9900 show A.jpeg

have a problem with my 9780 and 9900.
it sometimes occurs.
here is the problem.

normally, when we receive a (text) message, the home screen shows this.

A.jpeg

that means the indicator works.
and into message list, there is an unread message like this.

B.jpeg





BUT, sometimes this problem happens like this.
when i receive a (text) message,the indicator shows nothing.

C.jpeg

and into the message, there is no unread message.

D.jpeg

but i didn't read the message in the red circle.




i think this could be my setting problem.

and it mostly occurs when i lock my screen in my message list.

anyone can help me?

Instantly Unlock Your Blackberry
Use your blackberry When You Travel Unlock it now