ok – I see the properites of the file in IIS.
I have made a copy by going to that directory via Explorer and copying the file to a backup directory I have created.
So I don't edit the doc from IIS, I just double click from the directory I have naviaged to, correct?
Also, this is the parent of all my team sites (My Sites is on a different port). Should I edit this web.config file? Will this then fix the problem for all sub sites of the parent?
Thanks for your help!