VMA440 FTDI connection problem (FT232 to TTL)

Hi,
I just bought a VMA440 FTDI programmer (FT232 to TTL), but it seems does not work.
In fact, when connecting to USB port there is no change in the device manager.
I was expecting at least to see USB device appear and to install a driver, but here nothing. No new device, no new USB, no new COM port…
Probably I miss something!
Can someone help?
Phil.