My Blackberry 7230 (os 3.7) will not charge the battery. If I try with the USB connected to my PC it does nothing: nor charge the battery or try to connect and synchronize with my pc (the pc does not recognize the bb ?? an other bb is recognized from the pc). If I try with the AC adaptor for the BlackBerry it discharge the battery (I took the Battery of a BB 7730). Can some one help me?