Well, probaply there is a safe error, so here is what i did to include the model to UE2:
export the model as ASE with map. coord. and all
import the ASE file into the package "DevTest" (Group: Waffen, Name: Schwert1), applied a texture to it and saved the package as "DevTest.usx" in folder StaticMeshes, where all the other packages are
put the Mesh into the level ( right-click -> include StaticMesh...)
saved the level
then, after I restarted the Editor and load the map, there are these errors (Load Error: No missing files, but missing resources: Package DevTest.Waffen; StaticMesh DevTest.Waffen.Schwert1) and the model isn't there.
When I manually load the package before opening the map, its there (not "In-Game", only in the editor).
So, what do I have to do, to include it for the "Game"?
p.s.: the highdetail is set to false