Why can't I enable network discovery in Server 2008 R2

Every time I go into "Advanced sharing settings", select "Turn on Network Discovery", then click "Save settings", when I then go back to Advanced sharing settings "Turn off Network Discovery" has been re-selected.
I can understand this being true for Public networks, but not for home/work networks. This could be the reason that I can't connect to my server with Windows Explorer, from my Win 7 mobile workstation, and vice versa.
What could be causing this???

Hi,
This issue occurs for one of the following reasons:
•The dependency services for Network Discovery are not running.
•The Windows firewall or other firewalls do not allow Network Discovery.
To resolve the issue, follow these steps:
1.Make sure that the following dependency services are started:
DNS Client
Function Discovery Resource Publication
SSDP Discovery
UPnP Device Host
2.Configure the Windows firewall to allow Network Discovery. To do this, follow these steps:
Open Control Panel, click System and Security, and then click Windows Firewall.
In the left pane, click Allow a program or feature through Windows Firewall.
Click Change settings. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Select Network discovery, and then click OK.
3.Configure other firewalls in the network to allow Network Discovery.
4.Turn on Network Discovery in Network and Sharing Center
Quote from
http://support.microsoft.com/kb/2722035
Hope this helps.
Steven Lee
TechNet Community Support

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