Imported audio plays to a certain point, then quits

I imported a song from my music library and am using it as background to my
video (I have muted the video sound). However, 25 seconds into the video, it
just stops playing right where I have a title transition and the video keeps
going. When i delete the title and just go with video, it still stops at
that same spot while the video keeps playing...

Don't know how to fix it. Help!