Sajuuk is right you should be able to get into wow ok.

It sounds like you have the WTF folder set to Read only. Right
click the folder and choose properties, at the bottom see what it says.
If it's read only click on it to remove the tick then apply. then try
changing the settings.

If you have Vista maybe you have compressed of locked the file. Anywhay try the Read only thing first.

Did you have two installs of wow on your drive? Maybe you fixed one but them logged into the other one where the settings weren't changed. If all else fails delete WTF folder ... You will have to set-up again but it should be clean.

This problem is not keyclone related.