hello
can any 1 help me with my mossms i built a house for them with 3 parts bottom middle and top with stairs going up to each platform but i dont see them walking up them thay flot up to the next platform how do i get them to walk up the stairs thank you regards mouse

Hi! The key to doing this is called Pathfinding and we've written an article about how to do it here. We've also discussed it further in a forum post that's linked at the bottom of the article.

I noticed my biggest issue was i kept putting the walkable prims and static obstacle prims so close they mooshed. So now i make sure to see a teensy bit of space between prims. You can't really notice and it always fixes the issue.
Oh and if they moosh into the terrain the same thing...so lift floors a little bit up off the terrain.

to progenitor
well i dont know what viewer your using but im on phoenix and there is no pathfinder

I'm on Phoenix, too. Pathfinding is under the Build menu at the top of the screen. =)

im on phoenix viewer 1.6.1.1691 and i have looked and looked and there is no parthfinder there

Phoenix does not have and never will have pathfinding. It is no longer a supported viewer. If you want to be able to setup pathfinding you will have to use one of the more modern viewers that are optimized for the newer content. Firestorm (which is often mistaken for Phoenix) and SL Viewers both work.

You do not need to use the newer viewers to see pathfinding working, once it is properly setup, but you will have to use another viewer to set it up.

so what viewer should i use to do this

I've heard other people say they use the regular SL Viewer 3 for mesh uploads and pathfinding. Personally I use Viewer 3 all the time.

Progenitor is partially right. SL Viewer will work and Firestorm will work.