unable to connect Miro phone to PC

I have Miro phone and my phone war soft brick yesterday

I want to flash my phone to solve this problem

but i couldn't connect my phone to my PC

I installed PC companion and Sony Miro USB Drivers

but again windows couldn't found my phone

In one sec it connect and in one sec it reconnect (connect with this error

"USB Device Not Recognized" )

can anybody help me please ?