No CVS (Concurrent Version System) is a different version control platform it has no relation to SVN (Subversion).
CVS has been around for years and has been the defacto open source version control system until recently but Subversion aka svn is newer and better than CVS and many open source projects are now switching to it.
Bot CVS and SVN have servers and clients, TortoiseCVS is a client for CVS and TortoiseSVN is a cleint for Subversion (SVN)
In any case, glad its working for you now!