Login Screen is black in W2k3

Yesterday I have met this error at my office. I was little bit confused for this error.But I can fix it.You must need to copy color file from the another Microsoft Windows 2003 registry.Here is the step by step instructions.

1).  Copy the registry file from the another Microsoft Windows 2003 Server.The source file in (HKEY_USERS>.DEFAULT>CONTROL PANEL>COLORS).
2).  Export that Colors file.Copy it into the USB stick.
3).  After that go to the error computer.Open the registry and import that color file.

PS. You need to backup the registry and after that you have to import the registry file.