Code works in one case, but not in a similar case (registry editing). Help?

[Danja]

I'm trying to simply copy a registry key using the pre-built code here: http://www.codeproject.com/Articles/...y-Keys#_rating (note: the actual code is from the forum reply "Re: problem" by fallafab".

edit: the code is visible in the pictures below. I didn't realize this forum doesn't display IMG tags.

When I say that I want to copy ".nip" to ".nip_bak", the destination key is set properly:



However, when I want to copy "nip_auto_file" to "nip_auto_file_bak", the destination key is set to null:



Both registry entries already exist. What can possibly be causing this problem?

edit: I'm using .NET 4.0