I have a similar problem with the interface DVC3 512 - SIUDI9B. So far, it worked for about two years to Win7 / 32 and now stopped working.
After connecting to the PC Green LED blinks and then it just the red LED flashes quickly. I also tried to boot mode by shorting the ports P2-P3-P4-GND. After switching on the green and red LEDs flash slowly and Tools program reports that the device is not connected. I also tried to reinstall the software, another cable, another PC and still the same result. After connecting to Win8 just pop up bubble with the report that "The last device you have connected to this computer fails, and Windows does not recognize it." Does anyone help me?