Site-to-Site tunnel, Remote Server doesn't show up in Network Discovery

I have a remote site setup.  There is a site-to-site tunnel up between the two sites.  Main site is ASA5510 remote site is ASA5505.  At the remote site we have a few XP workstations, and one 2008 R2 x64 Server.  The remote server is a DC, DNS, & F/P server.

From the main site I have a Windows 7 x64 computer.  When I look at the Network via "Windows Explorer", I see the XP workstations at the remote site listed but I don't see the remote sites server.

I am able to script out drive mappings to this server, and ping / unc it by computer name.  But for some reason it is not coming up in network discovery.  I also use ScriptLogic Desktop Authority and when trying to add this DC to my server manager, it is not seen on the network list.  I have another 2008 R2 x64 located at the main site, and it is listed in the network list, so I wouldn't think I would need to enable any additional services.

What do I need to do to be able to get the remote server listed in my Network list?
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From what I understand, network discovery uses NETBIOS which is broadcast and therefore usually not routed over a VPN connection.  I would look into enabling NETBIOS over TCP IP on the server or settings up WINS.

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ZorniacAuthor Commented:
I tried the NetBIOS over TCP/IP option before posting the question, but it didn't seem to make a difference.  However, after uescomp also thought that might be a solution, I enabled the NetBIOS over TCP/IP again, and also enabled Network Discovery, this time I rebooted the server.  I am now able to see the remote DC in my network discovery, and also with my scripting program.
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Windows Server 2008

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