How to enable 'Recover Deleted Items' in registry using Windoes Vista
 

Using Vista and Outlook. 'Recover Deleted Items' is grayed out and was given instructions how to go to registry to enable this function. The instructions don't work because it tells you to get into registry and go down to HKEy_Local_Machine/software/Microsoft/exchange/client/options and then on the EDIT menu, click ADD VALUE. There isn't an ADD VALUE. Anyone have any ideas where to go next? Thanks