Go to the CC.NET machine. Login as the same account(identity) that runs the CC.NET SERVICE. (<
At the commandline..........run a svn.exe list command
svn list https://svn.aaaa.org:8443/svn/wim-web/Year%20Round%20Site/Trunk
(You'll have to find the full path for your svn.exe of course)
(or something like that)
See if you get prompted to accept a certificate. If so, select (p) for permanent.
Now re-try.
I've found you have to command-line accept the certificate before CC.NET-SVN will work.