monster crashes modelviewer/game

[candlejack131]

Hello their i was creating a custom enemy and it loads in the level editor just fine but crashes in the model viewer after i loaded its ent. i made it by opening the suitors ent in the model editor and imported the new mesh i then saved it in its own independent folder with its animations textures and dae does any one know what i did wrong? the custom story also crashes when i load it up if i placed the monster in the map