Xcode 4 에서 SVN 사용할 때 문제 해결

MacBook-Air:~ 이용자폴더$ svn ls svn://url/repository
Authentication realm: My First Repository
Password for '이용자폴더':
Authentication realm: My First Repository
Username: xxxxx
Password for 'xxxxx':
svn: URL 'svn://url/repository' non-existent in that revision
Ahn-Chang-Kiui-MacBook-Air:~ 이용자폴더$