UE3 - UT3 Static Mesh colision settings

hi evryone.
I got a question concerning static mesh colision.

I've got a tree imported to UE.
But I want its trunk and major branches to block projectiles, but I don't want leaves to do that. I have done a custom colision that is imported along with my static mesh, so that leaves (which r actually planes with alpha texture) dont have a colision polys on them.

However, no matter how I tweak static mesh colision optios in generic browser (useSimpleLine or useSimpleBox or blockZeroExtent or any other) it keeps always using my custom colision for player blocking and per-poly colision for all the projectiles

Eventually I just disabled colision in material properties, but I am wondering why actual static mesh colision setting did not have any effect.

Thanks for any info about that!

osirisrt, I tried even to disable collision for the whole tree (as if I would do for its parts), but it just didn't have any effect

billyclint, thanks, I did not know about UCX prefics. However, in my case my custom colision was done and worked even with an old ut200x prefics, I just could not turn it on/off for projectiles.

The problem that I have is that colision settings that I change in static mesh window (in generic browser) do not have any effect whatsoever