Problems with restoring a folder in SVN -

i deleted folder in svn realized need keep. tried this thread says should able do, doesn't work:

~/documents/svn/myproject > svn revert -r sandbox skipped 'sandbox' 

what doing wrong?

you committed "svn delete"? have 2 options:

1. you reverse merge of revision deleted directory: http://svnbook.red-bean.com/en/1.5/svn.branchmerge.basicmerging.html#svn.branchmerge.basicmerging.undo
2. you update working copy revision before delete, copy existing directory elsewhere outside working copy, update head again. can copy directory , re-add it. way loose (disconnect) history of directory, though.