
My block was on the wrong side and I know why. I was using fbx plugin 2010 something. Now I changed for fbx 2012.2 and it works like a charm !

Edit : Could you add a feature that would make us able to choose if we want the object to be in a tile
Here's an example because it's hard for me to explain in english : I'm talking of the green box
Because when we have 2 blocks that we want to put side-by-side, it's hard to put them exactly so that they work together.