Question
"When I try and run the sample on my Windows 2003 R2 machine I get this error.  I installed the latest Windows SDK on my machine but I still get this same error.  It fails on this line, or any other line dealing the IRdcLibrary.

IRdcLibrary rdcLibrary = (IRdcLibrary)new RdcLibrary();

ERROR:
{"Retrieving the COM class factory for component with CLSID {96236A85-9DBC-11DA-9E3F-0011114AE311} failed due to the following error: 80040154."}

    [System.Runtime.InteropServices.COMException]: {"Retrieving the COM class factory for component with CLSID {96236A85-9DBC-11DA-9E3F-0011114AE311} failed due to the following error: 80040154."}

    Data: {System.Collections.ListDictionaryInternal}
    HelpLink: null
    InnerException: null
    Message: "Retrieving the COM class factory for component with CLSID {96236A85-9DBC-11DA-9E3F-0011114AE311} failed due to the following error: 80040154."

    Source: "Microsoft.RDC"
    StackTrace: "   at Microsoft.RDC.RdcServices.GetRdcVersion() in C:\\rdcsample\\RDC.NET\\Microsoft.RDC\\RdcServices.cs:line 293"

    TargetSite: {Microsoft.RDC.RdcVersion GetRdcVersion()}"

Answer
"80040154 == ClassNotRegistered.
The RDC COM server is not properly installed.

• On any OS previous to Vista you must download and install the RDC MSI.  If that has already been done, then from the command-line run “Regsvr32 MSRDC.dll”. 
• On Vista RDC is always installed. 
• On post-Vista it is a optional component and may be installed via the control panel [links below]."

http://download.microsoft.com/download/e/e/0/ee02f60b-c002-47f7-a92b-8d7a58561cd9/AMD64FRE/msrdcoob.exe
http://download.microsoft.com/download/e/e/0/ee02f60b-c002-47f7-a92b-8d7a58561cd9/IA64FRE/msrdcoob.exe 
http://download.microsoft.com/download/e/e/0/ee02f60b-c002-47f7-a92b-8d7a58561cd9/X86FRE/msrdcoob.exe