Numbers not updating (iCloud) on iMac

Hi,

Numbers has stoppped syncing/uploading to iCloud on my iMac but works perfectly between iPhone & iPad.

It was working fine between all 3 devices until recently.

I've tried:

Switching on/off Documents & Data,

Reinstalling Numbers on iMac,

Moving files from iCloud to Desktop and back again

Only to be left with the "Waiting" cloud....

Your help would be HUGELY appreciated!

Thank you,

Warrick

OS X 10.9.3

IOS 7.1.1 (iPad & iPhone)

Numbers 3.2