Server 2008 - Cannot overwrite a file even if I am an administrator

Hi,

I log in to my windows server 2008 x64 box as 'administrator'. I browse to c:\datafolder and create a new text file. I open it, enter some text, save it, and exit.

I log out.

I log in as seymour.skinner: Seymour is in the 'administrators' group.

When I open the text file, and change the contents, and try to save it - it won't let me. I can save with a different name - but not overwrite. Also, if I try to rename the file, I get a prompt saying "Destination Folder Access Denied" and I have to press CONTINUE before it will do the rename.

I think this is something to do with inherited permissions?

How do I change the server such that ANY member of the administrators group may edit files?

Thanks.