Track line don't appears

[guallini]

I'm sorry but I don't have a clue what's going wrong on your machine. It has very likely something to do with Windows XP and IE 8 and/or Google who isn't testing/supporting old OS/browser combos that thoroughly anymor. There have been issues with Google Maps API 3.7 which I was able to fix when I had one last machine running XP but that died last year. And now Google Maps API 3.9 is the current stable release

Christian,

Many thanks anyway for your help.