How can I replace a texture on the "Static Object"?

[Makiavel]

Well, I renamed all the files (it is a copied butcher_knife entity), so now it looks like this:
entities\test\my_knife.dae
entities\test\my_knife.msh
entities\test\my_knife.ent
entities\test\my_knife.mat
entities\test\my_knife.dds

my_knife.mat uses my_knife.dds (copied and renamed hud_hurt_noise02.dds). my knife.ent uses the my_knife.mat

In model editor it looks the way I want, but when I try to do the model test, or to add it into my level, it looks just like usual butcher knife.

Maybe it is something with the .dae and .msh files?
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Yes, it seems so. When I import mesh my_knife.dae into the model editor it automatically sets the default texture. Is there any way I can edit a .dae file itself?