Having subscribed to iTunes match, my music won't play on any device!

Having subscribed to iTunes match, itunes on my Pc tells me upload/synch done, I can see it all on my albums, song titles, artwork etc on my; IPad, iPhone, Apple TV but when I try to play anything, it shows the song as normal, but plays nothing, progress bar doesn't move either - any ideas?

It's not my Internet, (using wifi at home) and everything else works ok, I've turned match off/on on ipad, turned ipad off/on etc and no difference. I can still see all my music, just can't l,ay any of it!