I found a fix by myself

[CoolBen8]

I have a wind (world position) shader on the foliage which works normally on terrain and as static meshes but as foliage the static meshes move like crazy.

Whats the cause of this?

[CoolBen8]

Is someone going to help me? This is really important, I need to work on my levels soon. Please someone.

[enter360]

I've never worked with foliage you might want to look at the jungle level that is shipped with UDK see if your settings differ and try making some adjustments