hOW I fixed the last prob was that I un installed vegas the installed it again. The first time I could not import any media files; I reinstalled vegas again then everything worked fine. I turn vegas off and I still have the same problems of rendering To avi egas says it can't write the file and that I should check that I have write access to the file. Then sometimes I try it and it just works fine. I kind of have the same problem in nuendo also, so it could be my new hard drives were not installed properly.
I wish you can be more specific about my settings ?