So you want to go from a Windows 8 to the RWW inside a network of a SBS 2008 server.
…and you are hitting this?
The wizard cannot configure Remote Desktop Connection settings. Make sure that the client version of Remote Desktop Protocol (RDP) 6.0 or later is installed on this computer.
1. Ensure you have the latest SBS 2008 update rollup. http://blogs.technet.com/b/sbs/archive/2012/09/25/update-rollup-3-for-windows-small-business-server-2011-standard-and-update-rollup-6-for-windows-small-business-server-2008-available-now.aspx
2. Use the classic IE not the metro one.
3. Put the url of the web site in the trusted site zone
4. Click on “compatibility” settings and place the site in compat mode.
Jump through all those hoops and you’ll get in just fine.