[Neil Jones]

Well according to Ukgameshows, Cleverdicks aired February to April 2012.

But this video from the old Challenge YouTube channel (which they haven't used for years and still has the previous look on its header) was put up in July 2012 suggests it had moved to Challenge less than three months later:
www.youtube.com 

Not sure if that means it wasn't a resounding success for Atlantic (though that may have more to do with the fact the channel is only on Sky (and later Now)) and they needed to make it work by shoving it on Challenge, or Atlantic just burnt it off.