Can't import a eclipse project

I create a version repository and import a eclipse project using below
commands,creating is ok,but importing can't be done.
  svnadmin create e:\svn-repos
  svn import -m "" . file:///e:/svn_repos/trunk/petclinic
the error is :
  svn:can't open ra_local session for url
  svn:can't open version repository “file:///e:/svn_repos/trunk/petclinic”
maybe real English isn't spoken that way,I just translate Chinese error info
into English.
before that everything is ok,suddenly that can't be done.
I'm confused much.
apache:2.2.9
subversion:1.5.2
Anyone any suggestion?thanks

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