VBScript: Remote Desktop Disconnected - error 50331656

Hi. I have a SBS 2008 Server up for about 6 months running fine. The issue I am having is using RWW. I can connect to to the server and check email, but am unable to connect to any workstation from a home office computer. This worked fine with the previous W2K3 server. The odd thing is I can make this same connaction from any other computer I have. The computer in question is running XP Pro IE7. I have reinstalled the RDP TS client on the desktop but that didn't fix anything. Have tried enabling/disabling the activex plug-in for IE. Any suggestions?
RWW.JPG
rtadminAsked:
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j210277Commented:
So to confirm all clients can connect to the SBS 2008 RWW except 1 xp station,  From the xp workstation open IE and go to https://servername:(port used for RWW)

you should get a certificate warning and then be redirected to the companyweb when you click proceed.

Also make sure the following is true:

Prerequisites for accessing Remote Web Workplace
Windows SBS 2008 sends all new users a "Welcome" e-mail that introduces them to the network features including Remote Web Workplace. Before users can access Remote Web Workplace, network administrators must satisfy the following requirements:

Users must be members of the Remote Web Workplace Users or the Domain Admins security groups.


Windows SBS 2008 must allow connections through TCP ports 80, 443, 987, and 3389.


The computer used to connect to Remote Web Workplace must allow connections through TCP ports 80, 443, 987, and 3389.


Routers on Windows SBS 2008 must be configured to forward Internet traffic to TCP ports 80, 443, 987, and 3389.


The browser used to view Remote Web Workplace must support and accept cookies. Otherwise, Remote Web Workplace refuses the connection.


Note:  4125 is no longer needed, I don't believe 6001-6004 are either.  (Actually I never opened those and RPC over HTTP has always worked).  If you don't need a port open for another application and it is on on the above list then I would close it.
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rtadminAuthor Commented:
The SBS 2008 RWW configuration is all good as far as we know.  As stated, no problems from all other workstations (in office and remote); just this one that is being used from home only for the RWW purpose.

Interestingly, we did work-around the problem by configuring an RDP connection with all the relevant domain account and computer name information and now the user prefers this to having to navigate the RWW menu and pick their office PC and login - now they do it with one click.
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