It would be hard for us to work out what it going on without seeing the log file. Can you say what site you are downloading from?
Can you try downloading a song again, and if it doesn't play then follow these steps:
1. Perform the action that is causing issues.
2. Go to the Jaksta menu at the top of the screen and choose Preferences.
3. Click the Find Log File button. You should see a log file highlighted in Finder.
4. Attach the log file to your forum topic.
From Ben Graham @ 25 Sep 2015 12:09