Can't connect via Windows 2003 RDP to Windows 2008 R2 Server

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http://serverfault.com – Already asked this question on stackoverflow, but was told it should be here. http://stackoverflow.com/questions/12404574/cant-connect-via-rdp-to-wind... I just installed a Windows 2008 Standard R2 server with RDS and 10 licenses. Whenever I attempt to connect to the server via RDP from a Windows 2003 server, I get the following error. I am however able to connect from a Windows 7 desktop and using a Linux RDP client. Anyone know why I'm getting this error and how to resolve the problem? Thank you in advance. I have tried various settings in gpedit.msc, but I don't think t (HowTos)