Kep,

 you need to add the key you want to edit remotely to the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\SecurePipeServers\winreg\AllowedPaths

  by default only Administrators can remotely edit the registry. I had never run up against this before because I typically only programaticaly access the registry for things that require admin privlages anyway, and therefore run from an admin account.

Regards
Meredith Shaebanyan