Help All Ship's Meshpoints have a position of (0,0,0)

I am new to modding and was hopping to create some extra ships for SINS.  I have read all of the Forge Tools documentation and some of the tutorials on this forum, so I kind of have a good idea on how to do this.  As of right now I have a halo ship in the game with textures and it can fly and attack just fine.  The problem I am running into is that all of my meshpoints (ie Weapon-0, Exhaust ... and so on) all end up at the ship's center (see below).  I have enter new values to the .mesh file but nothing seems to happen.  I thing It has something to do with how I have the nulls set up in softimageXSI, can anyone give me a good tutorial on how to set up Meshpoints (other than Ironclad's documentation)?

Thanks.

Point
        DataString "Weapon-0"
        Position [ 0.000000 0.000000 0.000000 ]
        Orientation
             [ -0.999990 0.000000 -0.004391 ]
             [ 0.000000 1.000000 0.000000 ]