Tree skin/model help

[The Twin Tailed Comet]

i tried to make a new destructable/tree based on a ... well ... tree
and i changed its model to a asteriod model i downloaded
(the model work on units)
but the editor just showed up a block and say can't load model =\
can some 1 tell me how 2 fix this?
thX

 

[Valcrist]

You cant make custom models from trees. Use a rock and change its target type