can't skip to next clip in iphone

Hi all,

I've downloaded numerous music videos onto my iphone. However when i go in and view one of them and i try to skip to the next one it doesn't do it.

It plays one then when it ends it goes back the the playlist. If i want to skip to the next song then i have to click 'done' then go back to playlist and click on the next one.

How come the skip doesn't work?

cheers,
mav.