Delete Online Identity Safe Vault

I have deleted my Identity Safe vault on my Windows 7 computer in NIS.  If I try to log in to Identity Safe in NIS on my computer now Identity Safe asks me to create a new password and then creates a totally new and empty Identity Safe vault on my computer.  When I log in to Identity Safe Online all my passwords are still there and subject to being stolen if someone steals my computer and/or master password.  If I sign in to Identity Safe Online I can delete passwords one by one which takes a very long time.  How may I delete my Online Vault all at once from Norton's servers?