This article was previously published under Q323497
After you install Windows 2000 Security Rollup Package 1 (SRP1), Terminal Services clients may not be able to connect to the Terminal Services server. You may also experience this problem when you use Remote Desktop Web Connection on a Windows XP Professional computer to connect to a Terminal Services server. When this problem occurs, event ID 50 is recorded in the system event log:
Event Type: Error Event Source: TermDD Event ID: 50 Description: The RDP protocol component "DATA ENCRYPTION" detected an error in the protocol stream and has disconnected the client.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
307454 MS01-052: Invalid RDP data can cause Terminal Services failure
The Terminal Services client may also receive the following error message during a connection attempt:
The terminal Server has ended the connection.
A potential race condition between the Icaapi.dll and Rdpwsx.dll dynamic-link libraries (DLLs) may cause the private certificate key on the Terminal Services server not to be synchronized.
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:
322756 How to back up and restore the registry in Windows
To resolve this issue, follow these steps:
Start Registry Editor.
Locate and then click the following registry subkey:
Microsoft Windows Server 2003, Standard Edition (32-bit x86), Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows XP Professional, Microsoft Windows Server 2003, Datacenter Edition (32-bit x86), Microsoft Windows Server 2003, Enterprise Edition (32-bit x86), Microsoft Windows Server 2003, Web Edition