Tracks Help needed with Porto 58 track.

[Gilles75]

I'm not sure why I'm having this problem (I've made many AI driving lines without trouble) but for some reason I cannot make an AI path for this track. I follow the same steps as with all the other tracks I've worked on but no 'candidate' file shows up in the ai folder. I don't know if it's the track, my PC or my AC installation, but if you can make the ai path file for me let me know and I'll send you a secret mediafire link to the track. The track is 90% finished.
Thanks.