If you faced the following subversion message in windows:

svn: PROPFIND request failed on '/repos/demosystemeic'
svn: PROPFIND of '/repos/demosystemeic': 503 Service Unavailable (http://x.x.x.x)

Probably the problem is caused because you are proxying your request via a proxy that doesn’t support HTTP methods like PROPFIND, etc.

If you don’t really need the proxy to access the repository edit the file c:\Documents and Settings_username_\Application Data\Subversion\servers (Note: Subversion directory is hidden)

and comment out the following items

http-proxy-host=xxx
http-proxy-port=xxx

NOTE: In linux the file is located at ~/.subversion/servers+