I installed .Net framework and Visual Studio .Net on my 2000 Pofessional.
Everything is fine except the framework has changed the security settings
everywhere.
I had to modify the security setting on the folders to be able to edit my
files however:

There is something wrong with my security settings on my FTP server.  I
cannot upload
with the FTP server after installing .Net programs.  I don't know how to
correct this setting!!

check your directory properties. Maybe it could be read-only