Reply to please help! traktor pro 2 wouldn't play the full track

Hello im a newbie in the world djing i have a traktor s2 running on traktor pro 2 i copied a few of my mp3 to the collection but when i load them on either a or b deck it wouldnt play the full track it would only play for a few seconds
But the song is 3-4 minutes long? Is there a setting for this? Please help