Error When Adding Solution to Source Control

I am sorry for current absent of docs, since this cause such
questions. Answers:
1. Added to source control can be only projects that currently not
controlled by source control system (like newly created).
2. If you want to "add" existing project, that is already under source
control (you pull it from SVN) then you need not to "add" it but the
"change binding". In other words just say for VS .NET that project is
Control".
3. Than nature of both CVS and SVN that they "store" bindings at the
local file system (in .svn or cvs sandbox). That means:
a) it is not possible to add already pulled project to the new
repository
b) it is not possible to change server path and so on.
This is why when you try to add it into other module "dialog" remember
your previous selection. It just look into .svn subfolder and get data
from there.
Once again sorry for missing docs, however, it will be really useful
to check docs for CVS proxy. All that I say there can be found in that
docs.
Please _let_ me know if this not help.