My blackberry 8320 (OS 4.5.052) doesn't charge from wall charger, but it does from USB cable.

I bought a new battery to see if that solved the problem, but I got the same problem. I also bought a new wall charger, and nothing. I charged those 2 batterys from a friend bb8320, So I don't think is a battery or charger problem.

The little lightning bolt appears for 5 seconds and then disappear when I try to charge it (from wall charger).

When it is connected to the computer it charges well, the little lightning botl doesn't disappear.

Could it be a software problem? I've read something about the "little lightning bolt" dissapear when the battery is full and you try to charge from a wall charger, but my battery isn't full.

Thanks for any help