Can't RDP to Server 2003 Standard

I have a network that runs 2 servers.  Both are Server 2003 Standard.  One is a DC.  The other is a Terminal server running Citrix.  On the Terminal Server, Citrix works, but I cannot RDP to the TS.  I have opened a command line and Telneted localhost 3389, but could not connect.  The only ports I have successfully been able to telnet to are 21 and 80.  I have no firewall service running.  I uninstalled the only known antivirus to eliminate that as a cause.  I cannot see if there is any other installed program that may be blocking virtually all ports.
zotfarmsAsked:
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zotfarmsAuthor Commented:
I am not sure why it stopped working, but it started working on its own and everything has been fine since.
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zotfarmsAuthor Commented:
Just in the last few minutes, now Citrix does not work either.  I looked at the terminal services manager, and it says that the server is listening for both RDP and Citrix, but neither work.
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meugenCommented:
have you tried to connect to the server using Program Neighbourhood through TCP 1494 Port?
Do you have any errors in EventViewer? Can u reboot the box and then try to see if you have any errors in EventLog, do you have a Licensing Server in your network?
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sprengyCommented:
Did it worked before? Did you tried to reboot the server (common issue within W2K3)?
Did you check whether remote administration is still enabled?
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zotfarmsAuthor Commented:
I did try to connect with net neighborhood with session reliability turned off, so it should have been going through port 1494.  I tried Winsockfix this morning.  The applet said that there were registry entries that it could not find, but after the reboot it seems to have come up.  It behaved as though there was a firewall blocking all ports last night.  I could telnet to ports 21 and 80 only.  Every other port seemed blocked.  After running Winsockfix, the ports seemed to be open, but I am not convinced that this is what fixed it.  I am concerned that the problem will come back.
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Henrik JohanssonSystems engineerCommented:
Do you get any error when trying to connect?
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Henrik JohanssonSystems engineerCommented:
A possibly solution is that the server service has got some extra system resources to play with.

If server service lack on available system resources, it will drop RDP connection without explanation. We have this symptom on some of the file servers and the only solution we've found is to restart the server service (LanManServer) locally on the server.
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MayhewCommented:
I had a similar issue with a Windows 2003 server and it turned out to be the video card drivers.  Did you update the video card drivers recently?  If not, try to see if there is a new video card driver update.
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tech-servicesCommented:
I would recommend this Microsoft Article.
http://support.microsoft.com/kb/555382

Article ID: 555382 - Last Review: July 31, 2005 - Revision: 1.0
You can not establish a Remote Desktop session to a computer running one of the affected products.
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