Screen lock timeout Group Policy

Hello,

I am trying to create a GP to enforce a screen lock timeout for my Windows 7 Pro 64 bit clients (but not necessarily a screensaver) that belong to a Windows 2003 Server 32 bit domain. 

I have attempted the following from both a Windows 2003 Server and also from a Windows 2007 Pro 64 bit client using Remote Server Administration Tools but cannot get the GP to take effect on a test OU & test Windows 7 Pro 64 bit client.

After adding a linked GPO, I have enabled the following under UserConfig\AdministrativeTemplates\Control Panel\Personalization

1. Enable screen saver
2. Force specific screen saver (tried adding one & also leaving as blank)
3. Password protect the screen saver
4. Screen saver timeout to 60 seconds

Once done, I ran gpupdate /force on the client & it successfully applied the default domain policy.

I must be missing a step or two so any helpful suggestions would be appreciated.

Thank you…