It seems to be a common fault with mobile phones that the USB connection to a PC causes problems. I have heard of similar problems with the Nokia Data Suite. I really think that your best bet is to get a Bluetooth dongle for the PC. I use this one which at £6 is cheap enough.
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Do you know that we're all in line for succession to the throne? Really?
Well, if forty-eight million, two hundred thousand, seven hundred and one people died I'd be Queen.