Security Question

[KMW]

I am writing an XML file to the root directory of my web site using asp.net. This works fine if I give Write Permission to Everyone,which I don't want to do.

From what I've read (I am not a network guy), Asp.net uses the IUSR_MachineName user or IUSR_VPSxxx. I don't have this user.

I've tried giving Write Permissions to IUSR_Template and ASP.Net Machine Account but neither of these work.

Should I have IUSR_VPSxxx or is there another account I can give permission to which gives permission only to the asp.net application?
Thanks
Kevin

[Stephen]

PMing you a script to check the user it should be permissions for. it is probably network service, but this will help as well.