Ending Votes: LiveJournal polls can be closed by clicking on the poll number, then clicking on the [ Close Poll ] link at the top of the page. A closed poll can be reopened by clicking on the [ Reopen Poll ] link in the same location.
Do Not Delete Polls: If you delete an entry that contains a poll, the poll will become inaccessible. You cannot create a new entry to restore an inaccessible poll; you must create a new poll.
http://www.livejournal.com/support/faqbrowse.bml?faqid=69
Do Not Delete Polls: If you delete an entry that contains a poll, the poll will become inaccessible. You cannot create a new entry to restore an inaccessible poll; you must create a new poll.
Maybe that helps? :D