Why doesnt the Demonhunter and Evil Illidan models not work anymore?

Ok I opened my map in WEU and I see this error sign in yellow text that says
Could not load file: Units\nightelf\HeroDemonHunter.mdl
Could not load file: units\nightelf\EvilIllidan\IllidanEvil.mdl
And I really need those models because I'm tryin to finish up V3 of my Super DBZ All Sagas but i cant witout those models the Demonhunter one has a skin but evil illidan doesnt but i still need him. So this is wat i did I took off the skin cause i thought it might be the skin so i took it off and i re-opned my map and the error still showed up and I really dont kno what I did wrong how to restore the model back cause all i see is this big green and black checkered box that takes place of the models. Please someone help me!