loop points set in rekordbox not looping when loaded to cdj 900 nexus

Hi i have setup a load of loops on tracks that i have exported to memory card.

When i load the usb all tracks have the loop points set in red but the track just plays right through unless i press the 'reloop' button which jumps straight to the loop beginning

Can anybody tell me how to setup the tracks to load so the 'loop' loops automatically?

Also i am using cdj 900 nexus 's

Thanks