Move it (and all the subdirectories) to a new location which is shared with "Full Control". Double click ServerPath and change it to the new WGPO location. If you have WFWG or W95 users, change the ServerPath= in their MSMAIL.INI.
Hive: HKEY_CURRENT_USER
Key:
Software\Microsoft\Mail\Microsoft
Mail
Name: ServerPath
Type: REG_SZ
Value: Change to
new WGPO location
To start over(delete it): Delete the WGPO directory and delete the Microsoft Mail Sub Key.