Remote Desktop Protocol Clients Cannot Connect to Terminal Services Server

Terminal Services clients may not be able to connect to a Windows 2000-based computer that is running Terminal Services.

When you use the Terminal Services Configuration snap-in (Tscc.msc), the transport (RDP-Tcp) appears to be present and working. However, when you view the transport by using Terminal Services Manager (Tsadmin.exe), the RDP-TCP listener is reported as "Down 65536."

This problem can occur if the server has been booted by using the Last Known Good Configuration option more than once. When the server has been booted into the last known good configuration more than once, the ControlSet001 registry key is deleted. However, the following registry value is hard-coded to use the ControlSet001 registry key:

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: To resolve this problem:

1. Start Registry Editor (Regedt32.exe).
2. Locate and click the following registry key:
   HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server\VIDEO\rdpdd\
   Note If you do not have this key, use Registry Editor to create it.
3. Do one of the following:
   • If you did not have to create the key in step 2, change the following value
     Name: \Device\Video0
     Type: REG_SZ
     Value: \REGISTRY\Machine\System\ControlSet001\Services\RDPDD\Device0
     to the following:
     Name: \Device\Video0
     Type: REG_SZ
     Value: \REGISTRY\Machine\System\CurrentControlSet\Services\RDPDD\Device0
   • If you had to create the registry key in step 2, add the following value:
     Subkey name: RDPDD
     Name: \Device\Video0
     Type: REG_SZ
     Value: \REGISTRY\Machine\System\CurrentControlSet\Services\RDPDD\Device0
4. After you change (or create) the value, restart the computer that is running Terminal Services.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.