Song skips after 16 seconds to the next one

I bought a song in Itunes, but when I try to play it on my Imac the song skips after 16 seconds to the next one. I have this problem only on my Imac. The same song works on my iphone and can be played till the end.

I already checked the song information where you can set stopping points but there's no stopping point for this song set. I also aren't able to download the song again. So how can I fix this proplem?