Your track takes forever to upload. When you hover the mouse over it, an error message appears. Out of our experience, most of the upload issues are linked to uploads being made with tracks saved under a non-supported format.
If the upload doesn't work, but the format is correct, you can try to re-export the master in this format once again. Something may have gone wrong with the initial encoding. Upload the new master to Jamendo.
Now all that is left to do is to delete the track that got stuck. For this send us a request (see above) and indicate (1) the direct link to your artist account (2) the name of the track in question.