Group Policy to remove access to network connections

Hi,

I've setup a group policy to prohibit access to the properties of a LAN connection and I can't seem to get it to work. I also set the same policy to remove Internet Options and Network Connections from the Control panel. Internet options has disappeared, but network connections hasn't (I used ncpa.cpl for network connections).

I've run a policy results wizard and it does appear to be working, but it's not..

Network/Network Connections
Policy Setting                                                                                          Winning GPO
Prohibit access to properties of a LAN connection Enabled                  Network & Control Panel
Prohibit access to properties of components of a LAN connection Enabled Network & Control Panel
Prohibit access to the Advanced Settings item on the Advanced menu Enabled Network & Control Panel
Prohibit adding and removing components for a LAN or remote access connection Enabled Network & Control Panel
Prohibit Enabling/Disabling components of a LAN connection Enabled Network & Control Panel
Prohibit TCP/IP advanced configuration Enabled Network & Control Panel

The user is only a member of domain users and there aren't any local policies affecting the machine. There are no GP errors in the event logs either.

Can someone point out what could be stopping this from working fully?

Thanks

Paul