Thanks for the answer So, I'm sorry. My modlist (FOMM): [x] Fallout3.esm[x] Anchorage.esm[x] ThePitt.esm[x] BrokenSteel.esm[x] PointLookout.esm[x] Zeta.esm[x] Lings.esm[x] LingsDLC.esm[x] Sharing and Caring Companions.esm[ ] Fallout3_MyMansion.esm[ ] Comp1.esm*[ ] Comp2.esm[x] Comp3.esm[x] Comp4.esm[x] Fellout-BrokenSteel.esp[x] Fellout-Anchorage.esp[x] Fellout-Zeta.esp[x] Fellout-PointLookout.esp[x] Point Lookout Shack.esp[ ] Fallout3_MyMansion.esp[x] Fellout-Full.esp[ ] UndergroundHideout..esp[ ] SSN715SubmarinePlayerHouse.esp*selfmade companions But I've already tried to disable them all except this mod and the DLC/Fallout.esm. Nothing change... Only if I disable the building-mod(s) it works well. Other details (maybe important): It's a 'Game of the year edition', so all DLCs; german version with an uncutpatch; the newest patch is installed.