collision with objects

I have an issue with a sprites collision not working for all objects that have a solid behavior to them....could z ordering have something to do with it??

Also with z order, is that layer based..if I right click a sprite and set the z order to the top..is that go ontop of everything in the scene..or just the top of the layer that its on, or all the layers in the project?

Collision should happen regardless of the Z order. Top of Z order is the top layer you have set up. Send link to .capx if you want some help with this. It could be any number of things - perhaps the collision is not set up correctly on one of the sprites? do you have behaviours attached to the sprites where they are set to not collide with solids?

since the object that was falling had a physics behavior applied to it..i had to make the platforms have the physics behavior as well to stop them from falling through.