BTW, on my server the account is IIS_IUSRS, not IIS_IUser. Is that a problem?

Thanks.

Mark

No luck, I'm afraid. I tried adding these permissions but still receive the same error. The nature of the error hints (to me, at least) that this is something to do with the structure/tags of the file itself, rather than a permissions issue.

Thanks.

Mark

Thank you, Julien. I'm getting a tad confused by this and hope you can point me in the right direction. On this IIS 7.5 server I had previously changed the application pool identity to NETWORK SERVICE. I have no particular need to use that identity beyond it was the only way I could get it work :)

My other app pools are set to ApplicationPoolIdentity. Sure enough, if I go into Advanced Settings I can change the identity to ApplicationPoolIdentity (it shows up in the drop down). However, when I go to the file system and try to set permissions for that identity it is not recognized (I copied/pasted from the IIS Manager to make sure I had no typos). I tried ApplicationPoolIdentity on it's own and also IIS AppPool\ApplicationPoolIdentity but it never recognizes this identity. It DOES recognize IIS AppPool\DefaultAppPool.

Should I / could I use that account? I am curious to know why ApplicationPoolIdentity isn't showing up though.

Thanks.

Mark