Thank you very much, i succeeded!
As Awesomesauce said, export the model as X3D instead of milkshape.
And use the correct BLPConverter to avoid weird texture or black texture when you move further.
I used this BLP converter: https://www.wowinterface.com/downloads/info14110-BLPConverter.html
Remeber add \R flag after the target in the property page of the BLPconverter.exe shortcut to generate right BLP.