Windows 8 RDP session and /multimon not working

I am trying to connect a Windows 8 computer to a Terminal Server using Remote Desktop and two monitors. If I use /span the Terminal Server session desktop uses both monitors as one big monitor. Not what I want. If I use /multimon the Terminal Server session shows on only one monitor instead of allowing the use of both monitors. How can I get /multimon to work with both monitors?
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after opening rdp do not connect.  go  to the display tab and check   “use all monitors for the remote session” in remote desktop client display option.
OOsorioAuthor Commented:
Already did.
Lee W, MVPTechnology and Business Process AdvisorCommented:
You said you're connecting to a Terminal Server?  If you are, that's the issue.  Terminal Server is a 2008 (non-R2) and earlier feature.  A Remote Desktop Session (RDS) is what you need - this feature was introduced with Windows Server 2008 R2 and 2012.

More information from this MS Blog:

And reference the Technet article:

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OOsorioAuthor Commented:
I am using Windows Server 2008 Standard, not R2. Thanks,
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