Lift the side up from the bottom and pull out it should lock. I could not get mine to lock when I was trying to lift the side up from the top as I thought I should once I started to lift from the bottom ( well midways down the side) it would catch almost effortlessly, hope this works for you as it did me.
Answers & Comments
Lift the side up from the bottom and pull out it should lock. I could not get mine to lock when I was trying to lift the side up from the top as I thought I should once I started to lift from the bottom ( well midways down the side) it would catch almost effortlessly, hope this works for you as it did me.