iPhone won't play through playlist/won't load or play next song, HELP?

[sarahemon]

I have Spotify on my iPhone, and I will play a song and it won't automatically move on to the next song... so when the end of the song I chose comes, it picks the next song but never loads it, so I have to pause and play it again or skip to the next track and come back. Is this a setting I messed with somehow or a glitch?