Hi,
Dont panic, just make sure you have the drivers correctly installed. You can try it on a different pc or laptop?
Once you have the driver correctly installed...
Open Setools lite and connect your phone using 2+5 keys and re-flash your eprom (bios) once Setools fixes your broken EPROM you will be able to connect using C key...
you can also use xs++ to fix your eprom, just download the correct eprom (bios) from topsony.com and proceed to flash your eprom, there's a tutorial online on how to flash your eprom using xs++
Remember you have to fix your EPROM first...
If you find my post usefull use the thank you button bellow