A little help with nifscope?

[Vartoz]

Hi everyone, i downloaded McMuffin´s Daedric Lord Armor. i exported it as an .obj and modified it in Softimage.

After that i exported back to obj and opened again in nifscope but here is the problem. I followed the tutorials to reattach the mesh to the skeleton but when i try to wear it ingame the mesh just doesn´t show up. It´s not like my char´s body turns invisible, it´s just as if i´m not wearing anything at all.

If any of you knows of a tutorial that can help me with this please post the link.