Web Remote Desktop - can't connect

First, I would like to ask if it is possible to activate the Web Remote Desktop for Server 2008?  I have searched for an answer and can't find a whole lot on the topic.
Second, I set it up on one of my 2003 servers (according to the article on: http://www.petri.co.il/install_remote_desktp_web_connection_on_windows_server_2003.htm).I am able to get to the page but always get the following error when I try to connect: "VBScript: Remote Desktop Disconnected. The client could not connect to the remote computer.  Remote connections might not be enabled or the computer might be too busy to accept new connections.  It is also possible that network problems are preventing your connection.  Please try connecting later..."
We are not making this available to the internet (only internally).  Remote Desktop is enabled in the server (although we use a port other than 3389 to access it when using the MS RD client).  I tried making the same change on the web client (http://support.microsoft.com/?kbid=326945) but then the page no longer loads up...
in any case, I am not sure if the port is causing the problem...  Please let me know if you have any suggestions.
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TSAdmin8Asked:
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Robin CMSenior Security and Infrastructure EngineerCommented:
2003 tsweb is just a set of pages hosted by iis. Embedded within one of them is an ActiveX RDP client.
If you've followed the instructions in 326945 then that should be it.

Have you tested with the normal RDP client (mstsc.exe) from the PC that the web client is failing to connect from?
If that works then check your html editing again. If that fails then you have firewall-type issues either on the client, server, or somewhere in between.

A common mistake is that people seem to think that the 2003 tsweb client is able to send the RDP data over http/port 80 - this is not the case, it's just to save you having to install the RDP client, which is kinda redundant now as all versions of windows (i think, business ones anyway...) come with that as standard now.

As for Server 2008, see this: http://technet.microsoft.com/en-us/library/cc771908(WS.10).aspx
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