Particles phasing through collsion plane

I am trying to create an animation title based upon BlenderGuru’s tutorial in compositing and while trying to make the particles collide with the plane they just pase through. The collision physic is set on thei plane, however the action itself is not happening please help.

Make sure your particle emitter and your collision plane share a layer.

yeah they’re on the same layer i guess its a weird bug with blender because as soon as i made a new one the phasing stopped and the physics kicked in.