New PCSGU250 not active

I run Windows 7 64 bits with PCSGU250
I installed the software, but when plugging the USB cable, nothing happens as I would expect for driver installation . I have downloaded the latest driver, but it is of little use until I get my device detected
Regards for the help

Please test it first on another PC, if the unit is still not working (must ask for driver, etc), there is possible a hardware problem?
You can best contact your dealer, for reapair (exchange).

Have you tried this:
Go to Device Manager.
There locate the PCSGU250 under “Other devices”.
Double click it, select Driver tab and click “Update driver” button.
Locate the driver folder.