Loading 3rd party dll failure

Summary

The Routing and Remote Access service failed to start because it encountered an error while loading a vendor's administration or security DLL.

Causes

The most common reasons for this error are:

• The path for the DLL is improperly specified in the registry.

• The DLL does not implement the functions required by the service.

• The DLL implemented the required functions, but one of the functions failed.

• The server cannot run the DLL in Windows NT mode.

• The specified DLL is not a valid application.

• Sample Event #1: Cannot load the Security host module component. The following erroroccurred: %1

• Sample Event #2: Cannot load the RAS third party administration DLL component.The following error occurred: %1

• Sample Event #3: Cannot load the Security host module component. The following erroroccurred: %1 is not a valid win32 application.

• Sample Event #4: Cannot load the RAS third party administration DLL component.The following error occurred: %1 is not a valid win32 application.

Resolutions

• Open Registry Editor, and

• verify that the path to the administration DLL is spelled correctly in the value for: HKEY_LOCAL_MACHINE\Microsoft\RAS\AdminDll\DllPath

• Verify that path to the security DLL is spelled correctly in the value for the HKEY_LOCAL_MACHINE\Microsoft\RAS\SecurityHost\DllPath registry key. If a path to a DLL contains any environmental variables (such as %systemroot%), verify that the variables are valid for the operating system. Environmental variables might need to be expanded.

• Verify whether the SYSTEM account has read/write permissions for the key. To check the permissions:

• Right-click the registry key, and click Permissions.

• Verify whether the SYSTEM account has read/write permissions for the key. If not, add them.

• Check with the DLL vendor to see whether the security DLL implements the following functions:

• RasSecurityDialogBegin

• RasSecurityDialogEnd

• Check with the DLL vendor to see whether the administration DLL implements the following functions:

• At least one of the following functions:

• MprAdminAcceptNewConnection

• MprAdminAcceptNewConnection2

• MprAdminAcceptNewLink

• At least one of the following functions:

• MprAdminConnectionHangupNotification

• MprAdminConnectionHangupNotification2

• MprAdminLinkHangupNotification

• Either both or neither of the following functions:

• MprAdminGetIpAddressForUser

• MprAdminReleaseIpAddress

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