Ikea Lack

How do I take down an Ikea Lack Shelf?
I have some ikea lack floating shelves on the wall of my new flat (inherited from the last tenant) and I want to take them down, how do I do it? I've tried pulling and sliding every which way but they won't budge. Thank you. x
http://www.ikea.com/us/en/catalog/products/60103632
there should be 2 small screws on the underside of the shelf,when undone the shelf should slide off toward you,you are then left with just the brackets which are easily unscrewed
hope this helps
Fixing an Ikea Lack Shelf to a dry lined wall
