Nokia E72 charging problem

I have my Nokia E-72 which only charge through USB cable. When I connect it through pin charger it shows the "charging" sign but doesn't charge even I connect it for 8 hours.:confused: I used charger AC-3E for this. Please someone give any suggestion what should I do.

Ask on [url]http://discussions.nokia.com/t5/Eseries-and-Communicators/bd-p/communicators[/url] or visit your nearest Nokia authorized service/repair center [url]http://www.nokia.com/repair[/url]