arc lt15i update problem

[#1]

I can not update my arc. while pc checks arc it turns off itself and  'pluging usb cable while pressig return' does not work

[slimshaddy]

http://dl-www.sonyericsson.com/cws/download/1/110/61/1309763183/Update_Service_Setup-2.11.7.13.exe

update with this