Error connecting to repository

I am using SVNSCC and attempting to add a solution to a remote repository.
I am using the most recent version, downloaded and installed today.

The repository is located at http://192.168.3.97:8081/svn/u353. From the
"Select SVN URL, Module, and Local Path" dialog box, when I enter this url,
my userid and password and click "Login", I receive this error:

svn: PROPFIND request failed on '/'
svn: PROPFIND or '/': 405 Method Not Allowed

The sysadmin tells me that the access failure is coming from the '/'
directory on the Apache server, rather than the /svn/u353 directory as
specified in the base repository URL.

Note: I am able to successfully connect to the repository using the
command line and the RapidSVN client.

What can we do to correct this?

Thanks,
Charlie