Instinct unable manual update beta release

I have followed this instruction from https://www8.garmin.com/support/download_details.jsp?id=14527

After copy GUPDATE.GCD file to the Garmin folder then disconnect device, nothing happens. 

If we connect again to the computer, GUPDATE.GCD is not there in the Garmin folder

Device: Instinct APAC software Ver: 6.60