It seems that my ISP had set of file types predefined. Even though I was defining the files I was usint the pre-defined ones would override mine.
Anyway my problem was solved you using my ISP’s program on my control panel have them do an equivlent of an
.htaccess
AddType application/octet-stream gpx
It is my understanding that it is a security issue when the correct MIME type is not available to the server and the browser “guesses”.
My stuff works now, so I am happy.
en