List of Managed Web Sites in Per Site Privacy Actions is blank
 

I am running XPSP1 and IE6. The list of blocked and allowed cookies that was in my Internet Options, Per Site Privacy, Managed Web Sites pane dissapeared! The list still exists in the registry HKCU/software/microsoft/windows/current version/internet settings/p3p/history. Any ideas on how to restore teh list to IE6 so it can be edited? Thanks.