I took off a weapon from a model but now it wont show up in game

ok, so im new at model editing or whatever your want to call it. i downloaded a model and edited it with MDL vertex converter and took off his weapon. when i view the model in the warcraft 3 viewer 2.3 it looks fine and has no weapon but then when i go to put it in the game i import it and delete the begining warcraft3 thing in front of the name and then i go to put it in and it only shows up as a box. yes i close and open world editor first. am i putting the code in wrong when i rename it or somthing?