Windows Server cannot discover Mac Mini

I am having difficulty allowing my Windows Server 2008 R2 to discover my Mac Mini. I can see the server from my Mac but not vice versa. I have tried configuring WINS on the mac with no luck.

I have a Windows Server 2008 R2 Enterprise running as a workgroup.
It is configured for Home Network Mode with discovering enabled.
The Workgroup name is Workgroup.

On the Mac side I have a Mac Mini running OS X 10.7
I have File sharing enabled and it is configured for SMB
I have tried going to the wins section of the mac from my Wifi connection and tried the following configuration:

Net Bios Name: PRODUCTION-MAC-MINI
Workgroup: WORKGROUP
Wins Servers: (My Routers IP address)

With no luck

Am I missing something here?

Any suggestions?

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