Hi,
kml files can contain several types of information, but mostly waypoints. And that's exactyl the question.
What does your converted gpxfiles contain?:
- lines beginning with <trkpt .....
- lines beginning with <wpt ...
- lines beginning with <rtept ...
You can't use the files with waypoints (<wpt..) as they are the same as favourites. Just a bunch of markers of interesting places.
files with <trkpt (track files) and <rtept (route files) or combinations of those can be used for routing.
Note that the track and route files sometimes also contain a number of <wpt lines as they are indeed the waypoints/landmarks/milestones, etc. in your route/track.
Anyway, if it is only wpt you need to reconvert.
gpsbabel is very versatile, but I would advice routeconverter as it allows yout to easily control the output and it gives you the opportunity to create/modify your downloaded routes.
Harry