My phone knew a problem last year, it used to switch off and on automaticlly, after that i use the pc suite to do an update to his system and it works for a couple of weeks, on day day, i forget to charge the battery and it still until the phone switch off automaticlly, when i tryed to charge it or replace it by an other charged battery, i see a red lamp still flashing in the "turn on/off" button... when i tryed to flash the phone i couldn't connect it to the computer pressing and holding the "C" button then connecting the cable...

pls i need your help, what i should do know :( ??

(sorry for my English!)