I hate Vista and 7. Sometimes when someone calls me to help them with those kinds of systems I don't answer the phone. Sometimes...
Anyways, I did a google search and found some stuff that might work better for taking ownership/granting permissions:
http://www.vistax64.com/tutorials/67...ship-file.html
http://www.ocmodshop.com/ocmodshop.aspx?a=851
http://www.winmatrix.com/forums/inde...sta-windows-7/
http://www.vista4beginners.com/Chang...take-ownership
Do the same for not just the config file itself but also the folder it's in.
Failing that wait for someone with more experience than me with Vista/7 to reply.