robohelp 11 does not compile in .net project

My RoboHelp problem is the demo which was supplied with the purchase of RoboHelp 11 fails to compile as instructed. The link given for the RoboHelp Demo can be located at:

http://help.adobe.com/en_US/robohelp/robohtml/WS5b3ccc516d4fbf351e63e3d11aff59c571-7f39.ht ml

I followed the demo instructions exactly but the code would not compile. I traced most of the errors and found them to be reference errors and I corrected them. The only error to date I could not immediately fix was the compile error:

Error 1 Interop type 'MSXML2.XMLHTTP30Class' cannot be embedded. Use the applicable interface instead. C:\Documents and Settings\allenj\my documents\visual studio 2010\Projects\RoboHelpDemo\RoboHelpDemo\RoboHelp_CSH.cs