Unable to change User Cache to cache everything (Shortcutlevel=1)

Hello all,

I am trying to set User Cache to Shortcutlevel=1. I have changed it in the config.xml file, but in the outlook tab is still shows under Additional information:

Messages eligible for caching: Only those with attachments


I have tried installing user cache and then changing Shortcutlevel=1, before starting outlook.

I have install usercache and then changed Shortcutlevel=1 and then rebooted.
.
I have tried changing Shortcutlevel=1 and then resetting usercache, stopping outlook and then restarting.

Any help would be appreciated,

Chatch