Trees not appearing in fog

[jonhysone]

Hi, I have imported a custom tree model and I replaced the Ashenvale tree with the custom one. Everything works perfect but the tree seems invisible in the fog (Doesn't even appear only when viewing it)

What would cause that ?

 

[Bloodbath]

is this field checked?

 

[jonhysone]

is this field checked?

That easy bro, thanks +REP