@ Tiboric thanks for all your help...
I think some of the problem might have been my own fault as I tried to flash the device from Vista 64 bit.
Now I've changed to a computer running Vista 32 bit, but now I can't get the device to initiate the flash mode.

Is the reason why I can't initiate flash mode (No USB icon when plugedin with U held down) because there's not enough power on the battery? and if that is the case is there any way to charge the battery?