A model in the wed and med is visible,but when I run the game,I can't see it any more!!please help!!

same here...

version?

Is the model possibly un-skinned/un-textured ? Thay will be vizible in
MED and WED cause they show actual polys in wirefrave/shaded mode.
And I have heard that un-skinned/un-textured models appear invisible
when running the engine...