Mp4 song from itunes doesn't play in the timeline
Strange to say, I just placed a song from itunes (.mp4 format) in my timeline, it is shown as a green block, no audio waveform and of course it doesn't play. From the internal media browser, I can see that it works perfectly. It plays well also in iTunes and finder. I tried to imported it to the library through the finder from the import window but the outcome is the same.
BTW It was regularly purchased in 2007... Any clues?
Thank you in advance for your help
Nico