we had migrate from Windows 2003 DC x32 to Windows 2008 DC x64 for certificate servers.
Everything working fine until the last steop of importing the old registry settings.
When adding the server role of CA Web Enrollment we received the following error message
Cannot Install Certificate Authority Web Enrollment
Active Directory Certificate Services setup failed with the followign error: The parameter is incorrect: 0x80070057 (WIN32: 87)
Change at HKLMSystemCurrentControlSetServicesCertSvcConfigurationSetupStatus to HEX 6001 (instead of 6003)(REG_DWORD)