gpx and google earth

[Jur]

I am making android application, where am I collectiong GPS information and in the end a make a gpx file with rte and rtept elements. It all works fine when I use trk,trkseg,trkpt but I can't make google earth show description of trkpt when you click on the point.
So can someone give me example or tell me how to properly make gpx that it will also show point description. Sry if this message is weird but I am all stresed out because of this, since I am trying to fix this for whole day.