Blueprint phys_ constraints on actor

Hi,

trying to constrain actors on the X axis.

In udk i added a RB_ constraint to my actors that restricted them on the X axis so i could do a 2d sidescroller thing.

im strugging with blueprints on how to achieve this same thing.

i added this to my bp’s components
so the mesh has physics, and i can go push that around

i even added to the bp graph :

setLocation(0, Location.Y, Location.Z)

but the box sometimes still falls off the X axis, it usually happens when its falling from one level to another