USB Friendly Name - Unable to erase configuration sector memory

I am using this tutorial to update my device: http://www.ghielectronics.com/docs/54/firmware-update-emx.

When I am trying rename usb device(step 8), error “Unable to erase configuration sector memory” ocurs. Visual studio can not deploy project.

On display I can see:
EMX
Version: 4.2.10.1
Debug: USB1
LCD: 320x240

Waiting for debug commands…

Can anybody help me?