Dragontat Rugani

i dont even have to try to upload for some reason everytime i build something in sl now i crash straight to desktop no warning nothing just poof.i have the current sl viewer all updated i even tryed phenoix viewer current updates doesnt seem to matter i start building and sl just crashes. started about a week ago.im trying to get out new items for customers and i cant till i figure this out. any help would be nice..