Nowhere near all exits on major highways/freeway/expressways have a Junction View associated with them. Set a simulated route from a major city which will take you outbound along a major arterial and you will soon see if it's working as you scroll thru the route. Look for the greyed out words 'Junction View' at the bottom of the screen to become bright and press on them to see the jcv pic. I suppose Capetown or Jo'burg would be the best for you to try. If you were using the NA map and did it with LA or NY etc the jcvs would be as thick as fleas on a monkey.
You definitely have it enabled as indicated by the splash of 1340-50 though, and sd:\Garmin\JCV\*.jcv is correct path for the file. Every map version has it's own specific jcv file. If you have the correct file associated with your map it will work.