ive got the new green ipod nano need some help!

hi there

ive got the new green ipod nano and ive got some imoves speakers, the ipod seemed to fit into the speakers fine but there was no sound coming from it, these are the speakers i have but just the pink ones : iMoves IP300 IPOD Speakers/Docking Station: Amazon.co.uk: Electronics

hoping someone can help me

thanks

how do the speakers hook up to the ipod, the headphone jack, or the charging slot?