2 sliding Blocks, One constrained with x the other constrained with y.... They dont collide?

Dellatron

In my game I have horizontal sliding blocks constrained with x and touch x, I need the vertical Blocks ( constrained with y and touch y) to slide up and down and not pass through the horizontal blocks when they are in the way.Using collide on the actors doesnt seem to work. Can anyone help out with how to get around this? It would be much appreciated

Rob2

Constrain overrides collide although the collision event is still triggered so you can use it to alter your logic.