Custom tree's... don't work?

Ok I got the enviornment pack in the downloads section... imported them all... well here is the result!.... Ok nevermind it won't let me upload ANYWAYS! But the tree's show up just fine in the WE but I go ingame to take some screen shots to post for the first terrains for my map... And all the tree's are gone what the hell is wrong?

I had the same problem. Take another non-tree destructible and modify it to be a tree. It'll work, if all the skins are ok.

Oh, btw, I don't think those environment pack trees are animated anyway...