Garmin C265 doesn't show upcoming highway exits names

Hi,

I have a Garmin 265 (China). Just patched the firmware following the link:
http://www.gpspower.net/garmin-recei...n-devices.html
Then I downloaded the north america 2017.20 map and the jcv file to the SD card.

The problem is: my c265 won't show the list of the highway exit names while driving!